CN109839963A - A kind of ultraviolet irradiation formula ozone generator concentration control method - Google Patents
A kind of ultraviolet irradiation formula ozone generator concentration control method Download PDFInfo
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- CN109839963A CN109839963A CN201910061651.4A CN201910061651A CN109839963A CN 109839963 A CN109839963 A CN 109839963A CN 201910061651 A CN201910061651 A CN 201910061651A CN 109839963 A CN109839963 A CN 109839963A
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Abstract
The present invention provides a kind of ultraviolet irradiation formula ozone generator concentration control methods, include the following steps: to calibrate, the ozone concentration that measurement ozone generator generates, and establish the relationship between ozone generator light intensity voltage and ozone concentration；Target light strong voltage is calculated, the relationship established when according to calibration calculates the corresponding target light strong voltage of target ozone concentration；Control output voltage is calculated, the control output voltage of ozone generator is calculated according to target light strong voltage；Ozone is prepared, according to calculated control output voltage setting ozone generator, prepares the ozone of target ozone concentration.Method provided by the invention can accurately control the ozone concentration of ultraviolet irradiation formula ozone generator generation.
Description
Technical field
The invention belongs to ozone preparation technical fields, and in particular, to a kind of ultraviolet irradiation formula ozone generator concentration control
Method processed.
Background technique
Ozone (O3) it is also known as super oxygen, it is oxygen (O2) allotrope, at normal temperature, it is that one kind has off-odor
Light blue gas.At normal temperatures and pressures, stability is poor, can voluntarily be decomposed into oxygen.Ozone is mainly used in medical water, pure
The industries such as water purification, mineral water, secondary water-supply, swimming-pool water, cultivation, food and drink water sterilization purified treatment；Chemical industry is made
The degreasings such as paper industry, decoloration, bleaching；For living, industry, hospital sewage emission compliance processing；And in instrument field,
The calibration of instrument and equipment and gas-phase titration etc..
It since ozone easily decomposes, can not save for a long time, bottled standard gas can not be made, therefore require in practical applications
Ozone generator, with providing ozone on site.By the model split that ozone generates, there are mainly three types of ozone generators: height is pressed
Electric-type, ultraviolet light illuminaton, electrolytic.Ultraviolet light illuminaton ozone generator is shone using the ultraviolet light of specific wavelength (185mm)
Oxygen molecule is penetrated, oxygen molecule is made to decompose and generate ozone.The ozone concentration of generation and the proportional relationship of the intensity of illumination of ultraviolet light, it is purple
The intensity of illumination of outside line is stronger, and the ozone concentration of generation is higher.Ultraviolet light is generally generated using mercury lamp, when the output control of mercury lamp
When voltage processed is higher, the luminous intensity of mercury lamp is stronger, and the light intensity of generated ultraviolet light is also stronger.In instrument and meter, doctor
It treats in the fields such as instrument, it is often necessary to using the ozone of various concentration, and have to the accuracy of the ozone concentration of generation higher
It is required that.
Summary of the invention
It, can be with by this method the invention proposes ozone concentration control method for ultraviolet irradiation formula ozone generator
The ozone concentration that accurate control ultraviolet irradiation formula ozone generator generates.For using ozone to be calibrated, demarcating, gas-phase titration
Equipment can greatly improve the accuracy of equipment, and also have extensively in fields such as disinfection, water process, environmental protection, medical instruments
General application scenarios.
Ultraviolet irradiation formula ozone generator concentration control method provided by the invention, includes the following steps:
Calibration measures the ozone concentration that the ozone generator generates, and establish the ozone generator light intensity voltage with
Relationship between the ozone concentration；
Target light strong voltage is calculated, it is corresponding that the relationship established when according to the calibration calculates target ozone concentration
Target light strong voltage；
Control output voltage is calculated, exports electricity according to the control that the target light strong voltage calculates the ozone generator
Pressure；
Ozone is prepared, according to ozone generator described in the calculated control output voltage setting, prepares the target
The ozone of ozone concentration.
In some embodiments of the invention, the control method further comprises the steps of:
Actual light intensity voltage is acquired, acquires the light intensity voltage of the ozone generator in real time；
Judge whether the target light strong voltage and the actual light intensity voltage absolute value of the difference are greater than threshold value；
If the voltage absolute value of the difference is no more than the threshold value, keeps the control output voltage constant, continue to acquire
Actual light intensity voltage；
If the voltage absolute value of the difference is more than the threshold value, the control output voltage of the ozone generator is adjusted.
In some embodiments of the invention, if the voltage absolute value of the difference is more than the threshold value, the ozone is adjusted
The control output voltage of generator includes:
Judge whether the actual light intensity voltage is greater than the target light strong voltage；
If the actual light intensity voltage is greater than the target light strong voltage, reduces the control output voltage, then proceed to
Acquire actual light intensity voltage；If the actual light intensity voltage is less than the target light strong voltage, increase the control output voltage,
Then proceed to acquisition actual light intensity voltage.
In some embodiments of the invention, the relationship is fitted using least square method.
In some embodiments of the invention, the control output voltage is calculated using pid algorithm.
In some embodiments of the invention, the ozone for measuring the ozone generator generation using ozone analyzer is dense
Degree.
In some embodiments of the invention, voltage absolute value of the difference≤threshold value described in the threshold value <
When 150%, if the actual light intensity voltage is greater than the target light strong voltage, reduce the control output voltage 0.005V；If
The actual light intensity voltage is less than the target light strong voltage, increases the control output voltage 0.005V.
When voltage absolute value of the difference≤threshold value 200% described in 150% < of the threshold value, if the practical light
Strong voltage is greater than the target light strong voltage, reduces the control output voltage 0.01V；If the actual light intensity voltage is less than institute
Target light strong voltage is stated, the control output voltage 0.01V is increased；
The threshold value described in the voltage absolute value of the difference > 200% when, if the actual light intensity voltage is greater than the mesh
Light intensity voltage is marked, the control output voltage 0.02V is reduced；If the actual light intensity voltage is less than the target light strong voltage,
Increase the control output voltage 0.02V.
Additional aspect and advantage of the invention will be set forth in part in the description, and will partially become from the following description
Obviously, or practice through the invention is recognized.
Detailed description of the invention
Fig. 1 is the process flow of one of embodiment of the present invention ultraviolet irradiation formula ozone generator concentration control method
Figure.
Fig. 2 is the relational graph in the embodiment of the present invention between ozone generator light intensity voltage and fitting voltage.
Specific embodiment
Below in conjunction with drawings and examples, a specific embodiment of the invention is described in more details, so as to energy
The advantages of enough more fully understanding the solution of the present invention and its various aspects.However, specific embodiments described below and reality
It applies example to be for illustrative purposes only, rather than limiting the invention.
It should be noted that unless stated otherwise, ozone generator of the present invention is ultraviolet irradiation formula ozone hair
Raw device.
Fig. 1 show currently preferred ultraviolet irradiation formula ozone generator concentration control method, includes the following steps: school
It is quasi-, calculate target light strong voltage, calculate control output voltage, acquisition actual light intensity voltage and prepare ozone.
Specifically, calibration steps includes: the ozone concentration for measuring ozone generator and generating, and establishes ozone generator light intensity
Relationship between voltage and ozone concentration.Preferably, the ozone concentration generated using ozone analyzer measurement ozone generator.
Generally there are certain non-thread between the light intensity voltage of ultraviolet irradiation formula ozone generator and the ozone concentration of generation
The relationship of property degree.The methods of least square method can be used to be fitted.Least square method fitting formula is as follows:
If the functional relation between x and y is provided by linear equation y=a*x+b, there are two undetermined parameter in formula, b, which is represented, to be cut
Away from a represents slope.Then a, b calculation formula are as follows:
It includes: dense according to the ozone generator light intensity voltage and ozone of calibration steps foundation for calculating target light strong voltage step
Relationship between degree calculates the corresponding target light strong voltage of target ozone concentration.
Calculating control output voltage step includes: the control output electricity that ozone generator is calculated according to target light strong voltage
Pressure.Ozone generator control output voltage can control ozone generator light intensity voltage, when control output voltage becomes larger, ozone
Generator light intensity voltage will become larger.Preferably, control output voltage is calculated using pid algorithm, that is, uses pid control algorithm, presses
The control output voltage of ozone generator is calculated according to target light strong voltage.
In process control, (also known as in the ratio (P) of deviation, integral (I) and the PID controller that is controlled of differential (D)
PID regulator) it is a kind of automatic controller being most widely used.Pid algorithm has principle simple, it is easy to accomplish, applicable surface
Extensively, control parameter is mutually indepedent, and parameter selectes the advantages that fairly simple.
PID calculation formula is as follows:
U (k)=Kp*e (k)+Ki* ∑ e (k)+Kd* [e (k)-e (k-1)]
The parameter tuning of PID controller is the core content of Control System Design.It is true according to the characteristic of controlled process
Determine proportionality coefficient, the time of integration and the size of derivative time of PID controller.The practical tuning method of PID controller parameter is existing
It is being generally adopted by aritical ratio method.Carrying out the adjusting of PID controller parameter using this method, steps are as follows: (1) pre- first
One sampling period short enough of selection allows system to work；(2) only additional proportion controlling unit, until system is to the step of input
There is threshold oscillation in response, writes down rate mu-factor and critical period of the oscillation at this moment；(3) integral and differential are then added
Link, observing system output, is adjusted repeatedly until meeting the requirements.The setting of pid parameter is by experience and technique
It is familiar with, reference measurement values tracking and setting value curve, so as to adjust the size of P, I, D.The size of the setting of pid parameter, a side
Face is will be depending on the concrete condition of control object；It on the other hand is experience.P is to solve amplitude concussion, and P is big to will appear width
The amplitude for being worth concussion is big, but oscillation frequency is small, and it is long that system reaches the stable time；I is the speed speed for solving action response, I
Big response speed is slow, on the contrary it is then fastly；D is to eliminate static error, and general D setting is all smaller, and to systematic influence ratio
It is smaller.
Preparing ozone step includes: to prepare the target according to calculated control output voltage setting ozone generator
The ozone of ozone concentration.
Acquisition actual light intensity voltage includes: the light intensity voltage of real-time acquisition ozone generator.Generally, ozone generator
Light intensity voltage is then to be converted into voltage by processing of circuit using the light intensity signal of the photoelectric sensors such as photoelectric tube sampling mercury lamp
Signal, the voltage signal after conversion is finally acquired using analog-digital converter, that is, A/D converter.
After the light intensity voltage for having acquired ozone generator, target light strong voltage and actual light intensity voltage absolute value of the difference are judged
Whether threshold value is greater than.If voltage absolute value of the difference is no more than threshold value, keep control output voltage constant, continues to acquire actual light intensity
Voltage.If voltage absolute value of the difference is more than threshold value, show that the ozone concentration error of ozone generator generation has exceeded system and permits
Perhaps range needs the output to ozone generator to control voltage and is adjusted.That is, being adjusted if voltage absolute value of the difference is more than threshold value
Save the control output voltage of ozone generator.
Preferably, if voltage absolute value of the difference is more than threshold value, the control output voltage for adjusting ozone generator includes: judgement
Whether actual light intensity voltage is greater than target light strong voltage.
If actual light intensity voltage is greater than target light strong voltage, reduce control output voltage, then proceedes to acquisition actual light intensity
Voltage.If more than target light strong voltage, illustrate that the ozone concentration that ozone generator generates is higher than aimed concn, therefore with regard to needing to subtract
Small control output voltage.
If actual light intensity voltage is less than target light strong voltage, increase control output voltage, then proceedes to acquisition actual light intensity
Voltage.If being less than target light strong voltage, show that the ozone concentration that ozone generator generates is lower than aimed concn, therefore just need to increase
Add the control output voltage.
For inventor according to a large amount of experiment discovery, the numerical values recited that control output voltage is reduced or increased is needed according to reality
Border light intensity voltage and the error amount size of target light strong voltage are calculated.
Preferably, when the 150% of the threshold value < voltage absolute value of the difference≤threshold value, if actual light intensity voltage is greater than mesh
Light intensity voltage is marked, control output voltage 0.005V is reduced；If actual light intensity voltage is less than target light strong voltage, increase control output
Voltage 0.005V.
When 150% < voltage absolute value of the difference≤threshold value 200% of threshold value, if actual light intensity voltage is greater than target light
Strong voltage reduces control output voltage 0.01V；If actual light intensity voltage is less than target light strong voltage, increase control output voltage
0.01V。
When the 200% of voltage absolute value of the difference > threshold value, if actual light intensity voltage is greater than target light strong voltage, reduce control
Output voltage 0.02V processed；If actual light intensity voltage is less than target light strong voltage, increase control output voltage 0.02V.
It should be strongly noted that in actual application, can according to the actual conditions of system to above data into
Row adjustment.
Control method provided by the invention can accurately control the ozone concentration of ultraviolet irradiation formula ozone generator generation.It is right
In calibrated, demarcated using ozone, the equipment of gas-phase titration can greatly improve the accuracy of equipment, and disinfection,
The fields such as water process, environmental protection, medical instrument are also widely used scene.
Below with reference to specific embodiment, the present invention will be described.Institute's taking technique condition value is in following embodiments
Illustratively, it can use numberical range as shown in foregoing summary, for not specifically specified technological parameter, can refer to often
Rule technology carries out.Detection method used in following embodiments is the detection method of industry routine.
Embodiment 1
The present embodiment prepares ozone using step as shown in Figure 1.
The ultraviolet irradiation formula ozone generator model that the present embodiment uses are as follows: Beijing SDL Technology Co., Ltd.
Model T1700。
Firstly, using the Model of TELEDYNE ADVANCED POLLUTION INSTRUMENTATION (TAPI) company
T400-UV Absorption O3 Analyzer ozone analyzer measures the ozone concentration that ozone generator generates, and establishes smelly
Relationship between Oxygen Generator light intensity voltage and ozone concentration.It is as shown in table 1 to measure the specific data of ozone concentration.Use minimum two
Multiplication is fitted, and the voltage data after fitting is as shown in table 1, relation curve such as Fig. 2 between light intensity voltage and fitting voltage
It is shown.The fitting formula that the present embodiment obtains is y=0.000842x-0.00211.
The present embodiment target ozone concentration is 100ppb, calculates mesh according to the relationship between fitting voltage and ozone concentration
Mark light intensity voltage is 0.082V.
Using pid control algorithm, the control output voltage of ozone generator is calculated according to target light strong voltage, it is calculated
Control output voltage is 0.868V.
According to calculated control output voltage setting ozone generator, ozone is prepared.
Actual light intensity voltage is acquired, the actual light intensity voltage of acquisition is 0.080V.
Judge whether target light strong voltage and actual light intensity voltage absolute value of the difference are greater than threshold value.The threshold of the present embodiment setting
Value is 0.01V.As it can be seen that voltage absolute value of the difference not above threshold value, continues to keep control output voltage constant, and it is real to continue acquisition
Border light intensity voltage.
Practical ozone concentration made from the present embodiment is 99.6ppm, only differs 0.4% with aimed concn.
Specific data are see table 2.
Embodiment 2
The present embodiment uses the identical step of embodiment 1 such as to prepare ozone, and difference is that target ozone concentration is 200PPb,
Specific data are shown in Table 2.
Embodiment 3
The present embodiment uses the identical step of embodiment 1 such as to prepare ozone, and difference is that target ozone concentration is 300PPb,
Specific data are shown in Table 2.
Embodiment 4
The present embodiment uses the identical step of embodiment 1 such as to prepare ozone, and difference is that target ozone concentration is 400PPb,
Specific data are shown in Table 2.
The present embodiment voltage absolute value of the difference has been more than threshold value, thus need to judge whether actual light intensity voltage is greater than target light
Strong voltage.As known from Table 2, actual light intensity voltage has been greater than target light strong voltage, therefore need to reduce control output voltage.The threshold
Value < voltage absolute value of the difference≤threshold value 150%, therefore the present embodiment will control output voltage and reduce 0.005V, then proceed to
Acquire actual light intensity voltage.
Voltage difference after adjustment is less than threshold value, continues to keep control output voltage constant, and continue to acquire practical light
Strong voltage.
Embodiment 5
The present embodiment uses the identical step of embodiment 1 such as to prepare ozone, and difference is that target ozone concentration is 500PPb,
Specific data are shown in Table 2.
The present embodiment voltage absolute value of the difference has been more than threshold value, thus need to judge whether actual light intensity voltage is greater than target light
Strong voltage.As known from Table 2, actual light intensity voltage has been less than target light strong voltage, therefore need to increase control output voltage.Voltage difference
Absolute value > threshold value 150%, and the 200% of≤threshold value, therefore the present embodiment will control output voltage and increase 0.01V, so
After continue acquire actual light intensity voltage.
Voltage difference after adjustment is less than threshold value, continues to keep control output voltage constant, and continue to acquire practical light
Strong voltage.
Embodiment 6
The present embodiment uses the identical step of embodiment 1 such as to prepare ozone, and difference is that target ozone concentration is 600PPb,
Specific data are shown in Table 2.
Embodiment 7
The present embodiment uses the identical step of embodiment 1 such as to prepare ozone, and difference is that target ozone concentration is 700PPb,
Specific data are shown in Table 2.
Embodiment 8
The present embodiment uses the identical step of embodiment 1 such as to prepare ozone, and difference is that target ozone concentration is 800PPb,
Specific data are shown in Table 2.
Embodiment 9
The present embodiment uses the identical step of embodiment 1 such as to prepare ozone, and difference is that target ozone concentration is 900PPb,
Specific data are shown in Table 2.
Embodiment 10
The present embodiment uses the identical step of embodiment 1 such as to prepare ozone, and difference is that target ozone concentration is
1000PPb, specific data are shown in Table 2.
The corresponding data of table 1 light intensity voltage and ozone concentration
| Light intensity voltage (V) | 0.1 | 0.2 | 0.3 | 0.4 | 0.5 | 0.6 | 0.7 | 0.8 | 0.9 | 1.0 |
| Ozone concentration (ppb) | 136.9 | 242.1 | 352.8 | 469.1 | 587.6 | 709.8 | 831.4 | 951.3 | 1075.8 | 1196.8 |
| It is fitted voltage (V) | 0.113 | 0.202 | 0.295 | 0.393 | 0.493 | 0.596 | 0.698 | 0.799 | 0.904 | 1.006 |
2 embodiment 1-10 related data of table
From above-described embodiment it is found that practical ozone concentration made from embodiment 1-10 differs very little with target ozone concentration.
As it can be seen that concentration more accurately ozone can be obtained using method provided by the invention.Moreover, method letter provided by the invention
Just, easy to operate, it is easy industrialization promotion.
Obviously, the above embodiment is merely an example for clearly illustrating the present invention, and not to embodiment
It limits.For those of ordinary skill in the art, other different forms can also be made on the basis of the above description
Variation or variation.There is no necessity and possibility to exhaust all the enbodiments.And it thus amplifies out apparent
Variation or variation be still in the protection scope of this invention.
Claims (7)
1. a kind of ultraviolet irradiation formula ozone generator concentration control method, which comprises the steps of:
Calibration measures the ozone concentration that the ozone generator generates, and establish the ozone generator light intensity voltage with it is described
Relationship between ozone concentration；
Target light strong voltage is calculated, the relationship established when according to the calibration calculates the corresponding target of target ozone concentration
Light intensity voltage；
Control output voltage is calculated, the control output voltage of the ozone generator is calculated according to the target light strong voltage；
Ozone is prepared, according to ozone generator described in the calculated control output voltage setting, prepares the target ozone
The ozone of concentration.
2. control method according to claim 1, which is characterized in that the control method further comprises the steps of:
Actual light intensity voltage is acquired, acquires the light intensity voltage of the ozone generator in real time；
Judge whether the target light strong voltage and the actual light intensity voltage absolute value of the difference are greater than threshold value；
If the voltage absolute value of the difference is no more than the threshold value, keep the control output voltage constant, it is practical to continue acquisition
Light intensity voltage；
If the voltage absolute value of the difference is more than the threshold value, the control output voltage of the ozone generator is adjusted.
3. control method according to claim 2, which is characterized in that if the voltage absolute value of the difference is more than the threshold
Value, the control output voltage for adjusting the ozone generator include:
Judge whether the actual light intensity voltage is greater than the target light strong voltage；
If the actual light intensity voltage is greater than the target light strong voltage, reduces the control output voltage, then proceed to acquire
Actual light intensity voltage；If the actual light intensity voltage is less than the target light strong voltage, increase the control output voltage, then
Continue to acquire actual light intensity voltage.
4. control method according to claim 1, which is characterized in that intended using least square method the relationship
It closes.
5. control method according to claim 1, which is characterized in that calculate the control output voltage using pid algorithm.
6. control method according to claim 1, which is characterized in that measure the ozone generator using ozone analyzer
The ozone concentration of generation.
7. control method according to claim 3, which is characterized in that
When voltage absolute value of the difference≤threshold value 150% described in the threshold value <, if the actual light intensity voltage is greater than
The target light strong voltage reduces the control output voltage 0.005V；If the actual light intensity voltage is less than the target light
Strong voltage increases the control output voltage 0.005V.
When voltage absolute value of the difference≤threshold value 200% described in 150% < of the threshold value, if the actual light intensity is electric
Pressure is greater than the target light strong voltage, reduces the control output voltage 0.01V；If the actual light intensity voltage is less than the mesh
Light intensity voltage is marked, the control output voltage 0.01V is increased；
The threshold value described in the voltage absolute value of the difference > 200% when, if the actual light intensity voltage is greater than the target light
Strong voltage reduces the control output voltage 0.02V；If the actual light intensity voltage is less than the target light strong voltage, increase
The control output voltage 0.02V.
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| CN114237031A (en) * | 2021-12-07 | 2022-03-25 | 上海康久消毒技术股份有限公司 | Space ozone concentration control method |
| CN115818820A (en) * | 2022-12-07 | 2023-03-21 | 如东深水环境科技有限公司 | Ozone oxidation device for predicting residual concentration of ozone based on self-adaptive feedforward network |
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