CN112146733B - Flour processing process safety monitoring system - Google Patents
Flour processing process safety monitoring system Download PDFInfo
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- CN112146733B CN112146733B CN202010996222.9A CN202010996222A CN112146733B CN 112146733 B CN112146733 B CN 112146733B CN 202010996222 A CN202010996222 A CN 202010996222A CN 112146733 B CN112146733 B CN 112146733B
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- 235000013312 flour Nutrition 0.000 title claims abstract description 83
- 238000012545 processing Methods 0.000 title claims abstract description 76
- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000012544 monitoring process Methods 0.000 title claims abstract description 27
- 239000000428 dust Substances 0.000 claims abstract description 19
- 239000003990 capacitor Substances 0.000 claims description 39
- 238000001514 detection method Methods 0.000 claims description 27
- 238000001914 filtration Methods 0.000 claims description 8
- 239000000843 powder Substances 0.000 claims description 5
- 230000008030 elimination Effects 0.000 claims description 3
- 238000003379 elimination reaction Methods 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 description 4
- 241000209140 Triticum Species 0.000 description 3
- 235000021307 Triticum Nutrition 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000003321 amplification Effects 0.000 description 2
- 230000002457 bidirectional effect Effects 0.000 description 2
- 230000003139 buffering effect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G17/00—Apparatus for or methods of weighing material of special form or property
- G01G17/04—Apparatus for or methods of weighing material of special form or property for weighing fluids, e.g. gases, pastes
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/85—Investigating moving fluids or granular solids
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
- G01N2021/0106—General arrangement of respective parts
- G01N2021/0112—Apparatus in one mechanical, optical or electronic block
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N2021/8411—Application to online plant, process monitoring
- G01N2021/8416—Application to online plant, process monitoring and process controlling, not otherwise provided for
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/85—Investigating moving fluids or granular solids
- G01N2021/8592—Grain or other flowing solid samples
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Abstract
The invention provides a flour processing process safety monitoring system, which comprises a feeding hole, a first electromagnetic valve, a buffer hopper, a first filter screen, a second electromagnetic valve, a second filter screen, a flour sucking device, a container, a dust sensor, a signal processing circuit, a pressure sensor, an image processor, a programmable logic controller, a first controller and a second controller.
Description
Technical Field
The invention relates to the field of intelligent monitoring, in particular to a flour processing process safety monitoring system.
Background
In addition to controlling the production equipment according to the production process requirements of the flour, the flour processing and production process has the advantages that under different production process conditions, due to the change of the matching proportion of the adopted wheat, the quality of the wheat is different, and the wheat wetting effect and other factors influence the yield, the yield and the power consumption of the flour.
In the process of flour processing, since flour is easily dispersed in the air, and explosive accidents are easily caused when the concentration of the flour in the air reaches a certain value, monitoring in the process of flour processing is very important.
Among the prior art, the phenomenon in the flour dispersion air takes place most easily when the bagging-off of flour in the course of working, not only has the potential safety hazard, but also can make the weight test when the bagging-off inaccurate, moreover, because in the flour dispersion air, when carrying out image monitoring to the flour course of working, effective image is easily submerged by the noise, and then can not reach the effect of monitoring.
Disclosure of Invention
Therefore, in order to overcome the problems, the invention provides a flour processing process safety monitoring system which comprises a feeding hole, a first electromagnetic valve, a buffer hopper, a first filter screen, a second electromagnetic valve, a second filter screen, a flour suction device, a container, a dust sensor, a signal processing circuit, a pressure sensor, an image processor, a programmable controller, a first controller and a second controller.
Specifically, the flour processing process safety monitoring system comprises a feeding hole, a first electromagnetic valve, a buffer hopper, a first filter screen, a second electromagnetic valve, a second filter screen, a powder suction device, a container, a dust sensor, a signal processing circuit, a pressure sensor, an image processor, a programmable controller, a first controller and a second controller.
The output end of the dust sensor is connected with the input end of the signal processing circuit, the output end of the pressure sensor is connected with the input end of the programmable controller, the output end of the signal processing circuit is connected with the input end of the programmable controller, the output end of the image sensor is connected with the input end of the image processor, the output end of the image processor is connected with the input end of the programmable controller, the input end of the first controller is connected with the output end of the programmable controller, and the input end of the second controller is connected with the output end of the programmable controller.
Wherein, the flour to be processed is transmitted to the feed inlet, at the moment, the programmable controller controls the first controller to control the first electromagnetic valve to be opened, the flour to be processed enters the buffering hopper through the feed inlet, a first filter screen is arranged at the connecting part of the buffering hopper and the container, the flour to be processed enters the container through the first filter screen again, the second filter screen is arranged in the container, the flour to be processed enters the bottom of the container through the second filter screen, the bottom of the container is provided with the dust sensor, the dust sensor is used for detecting a flour concentration signal in the air in the container and transmitting the flour concentration signal to the signal processing circuit, and the signal processing circuit performs signal processing on the received signal and then transmits the signal to the programmable controller, a flour concentration threshold value is arranged in the programmable controller, if a flour concentration signal received by the programmable controller is smaller than the flour concentration threshold value, the programmable controller triggers the pressure sensor to start operation, the pressure sensor is arranged at the bottom of the container and is used for detecting a flour weight signal and transmitting the detected signal to the programmable controller, at the moment, the programmable controller controls the second controller to control the second electromagnetic valve to be opened, and the flour suction device sucks the flour at the bottom of the container; the flour processing process safety monitoring system further comprises the image sensor, the image sensor is used for detecting image information of flour to be processed in the processing process, the image sensor transmits the detected image information to the image processor, and the image processor performs image processing on the received image information and then transmits the processed image information to the programmable controller.
Preferably, the flour processing process safety monitoring system further comprises a display device, and the programmable controller transmits the received image information and the flour weight signal to the display device for displaying.
Preferably, the signal processing circuit comprises resistors R1-R12, capacitors C1-C6, diodes D1-D4 and operational amplifiers A1-A3.
Wherein, the output end of the dust sensor is connected with one end of a resistor R1, the other end of the resistor R1 is connected with a power supply Vcc, one end of a resistor R2 is grounded, the other end of a resistor R2 is connected with one end of a resistor R1, one end of a resistor R1 is further connected with the non-inverting input end of an operational amplifier a1, one end of a capacitor C1 is grounded, the other end of a capacitor C1 is connected with one end of a resistor R4, the other end of a resistor R4 is connected with one end of a resistor R3, the other end of a resistor R3 is connected with the anode of a diode D2, one end of a resistor R3 is connected with the cathode of a diode D2, one end of a resistor R3 is further connected with the anode of a diode D1, one end of a resistor R3 is connected with the inverting input end of an operational amplifier a1, the cathode of a diode D1 is connected with the output end of an operational amplifier a1, the anode of a diode D2 is also connected with the output end of an operational amplifier a1, the output end of an operational amplifier a1 is connected with the non-inverting input end of an operational amplifier a2, one end of a capacitor C2 is grounded, the other end of a capacitor C2 is connected to one end of a resistor R7, the other end of a resistor R7 is connected to one end of a resistor R6, the other end of a resistor R6 is connected to the anode of a diode D4, the other end of a resistor R6 is connected to the cathode of a diode D3, the other end of a resistor R7 is connected to the cathode of a diode D7, the other end of a resistor R7 is connected to the anode of a diode D7, the other end of the resistor R7 is further connected to the inverting input terminal of an operational amplifier a 7, one end of a resistor R7 is connected to the output terminal of the operational amplifier a 7, the other end of the resistor R7 is connected to the cathode of the diode D7, one end of the resistor R7 is connected to the other end of the resistor R7, one end of the capacitor C7 is grounded, the other end of the resistor R7 is connected to one end of the inverting input terminal of the operational amplifier a 7, the other end of the resistor R7 is connected to one end of the inverting input terminal of the operational amplifier 7, one end of a capacitor C5 is connected with the inverting input end of the operational amplifier A3, the other end of a capacitor C5 is connected with the output end of the operational amplifier A3, one end of a resistor R10 is connected with the inverting input end of the operational amplifier A3, the other end of a resistor R10 is connected with the output end of the operational amplifier A3, one end of the capacitor C6 is grounded, the other end of a capacitor C6 is connected with the non-inverting input end of the operational amplifier A3, one end of a resistor R11 is grounded, the other end of the resistor R11 is connected with one end of a resistor R12, the other end of a resistor R11 is connected with the other end of the capacitor C6, the other end of the resistor R12 is connected with a power supply Vcc, and the output end of the operational amplifier A3 is connected with the input end of the programmable controller.
Preferably, the image processor performs image processing on the image information collected by the image sensor, and the image processor is adapted to perform noise elimination on the image information.
The image processor comprises an estimation unit, a noise detection unit and a spatial noise filter, the image sensor, the estimation unit, the noise detection unit and the spatial noise filter are sequentially connected, the output end of the image sensor is connected with the input end of the spatial noise filter, and the output end of the noise detection unit is connected with the input end of the programmable controller.
The estimation unit is used for estimating the local variance value of each pixel of the input image information Vi, the estimation unit takes a preset target pixel of the image information Vi as a central pixel and constructs a Sudoku area by taking the central pixel as the center to calculate the local variance value, and the nine pixel values are P1-P9, namely
Calculating the absolute difference values of nine pixels as follows:
then the local variance value var is obtained:
the estimation unit transmits the calculated local variance value var to the noise detection unit, a variance value threshold is stored in the noise detection unit, if the local variance value received by the noise detection unit is larger than the variance threshold, the noise detection unit transmits image information Vi to the spatial noise filter, and if the local variance value received by the noise detection unit is smaller than the variance threshold, the noise detection unit transmits the image information Vi to the programmable controller.
The spatial noise filter performs image filtering processing on the received image information, and transmits the processed image information to the programmable controller.
Preferably, the spatial noise filter performs image filtering processing on the received image information, and the specific steps are as follows:
step S1: a region of a predetermined size, for example, a3 × 9 region, is fetched for the image of the received image signal Vi.
Step S2: and with the central pixel as a central pixel, different weighted values W are distributed to different pixels in the area.
Step S3: filtering the image information according to the weight values, and then outputting pixel information outputpixel (i, j):
wherein the content of the first and second substances,
the weight values for each pixel within the region,
the pixel values of the pixel points in the region are obtained.
Step S4: returning to step S1 until the output values of all pixels are calculated, the output image information V is generated to the programmable controller.
Preferably, a temperature sensor and a temperature adjusting device are further arranged in the container, the temperature sensor collects temperature information in the container and transmits the collected temperature information to the programmable controller, a temperature threshold range is stored in the programmable controller, and if the temperature information received by the programmable controller is not in the temperature threshold range, the programmable controller controls the temperature adjusting device to adjust the temperature to the temperature threshold range.
Preferably, a humidity sensor and a humidity adjusting device are further arranged in the container, the humidity sensor collects humidity information in the container and transmits the collected humidity information to the programmable controller, a humidity threshold range is stored in the programmable controller, and if the humidity information received by the programmable controller is not in the humidity threshold range, the programmable controller controls the humidity adjusting device to adjust the humidity to the humidity threshold range.
Preferably, the programmable controller is wirelessly connected with the first controller, the programmable controller is wirelessly connected with the second controller, the first controller is wirelessly connected with the first electromagnetic valve, and the second controller is wirelessly connected with the second electromagnetic valve.
Compared with the prior art, the invention has the following beneficial effects:
(1) the invention provides a flour processing process safety monitoring system, which comprises a feed inlet, a first electromagnetic valve, a buffer hopper, a first filter screen, a second electromagnetic valve, a second filter screen, a powder suction device, a container, a dust sensor, a signal processing circuit, a pressure sensor, an image processor, a programmable controller, a first controller and a second controller, the flour in the container can be weighed and sucked out after being completely precipitated at the bottom of the container through the dust sensor and the signal processing circuit, so that not only can the accurate weight of the flour to be processed be returned, but also the safety in the processing process can be ensured, meanwhile, the image sensor and the image processor are adopted to effectively monitor the image information of the processing environment and the processing safety.
(2) The flour processing process safety monitoring system provided by the invention is characterized in that a bidirectional amplitude limiting diode is connected in series in a feedback loop of the front two stages of amplifying circuits of the signal processing circuit, so that overload caused by the amplifier when a signal is input can be avoided, and the dynamic range of signal amplification is enlarged through the circuit design.
Drawings
FIG. 1 is a schematic view of a flour processing safety monitoring system of the present invention;
FIG. 2 is a functional diagram of a flour processing safety monitoring system of the present invention;
FIG. 3 is a functional diagram of a signal processing circuit according to the present invention;
FIG. 4 is a functional diagram of the image processor of the present invention.
Reference numerals: 1-a feed inlet; 2-a first solenoid valve; 3-a buffer hopper; 4-a first screen; 5-a second electromagnetic valve; 6-a second filter screen; 7-a powder suction device; 8-container.
Detailed Description
The safety monitoring system for flour processing process provided by the invention is explained in detail with reference to the attached drawings and the embodiment.
As shown in fig. 1-2, the flour processing process safety monitoring system provided by the invention comprises a feeding hole (1), a first electromagnetic valve (2), a buffer hopper (3), a first filter screen (4), a second electromagnetic valve (5), a second filter screen (6), a flour sucking device (7), a container (8), a dust sensor, a signal processing circuit, a pressure sensor, an image processor, a programmable controller, a first controller and a second controller.
The output end of the dust sensor is connected with the input end of the signal processing circuit, the output end of the pressure sensor is connected with the input end of the programmable controller, the output end of the signal processing circuit is connected with the input end of the programmable controller, the output end of the image sensor is connected with the input end of the image processor, the output end of the image processor is connected with the input end of the programmable controller, the input end of the first controller is connected with the output end of the programmable controller, and the input end of the second controller is connected with the output end of the programmable controller.
Wherein, the flour to be processed is transmitted to the feed inlet (1), at the moment, the programmable controller controls the first controller to control the first electromagnetic valve (2) to be opened, the flour to be processed enters the buffer hopper (3) through the feed inlet (1), a first filter screen (4) is arranged at the connecting part of the buffer hopper (3) and the container (8), the flour to be processed enters the container (8) through the first filter screen (4), the second filter screen (6) is arranged in the container (8), the flour to be processed enters the bottom of the container (8) through the second filter screen (6), the dust sensor is arranged at the bottom of the container (8) and is used for detecting a flour concentration signal in the air in the container (8) and transmitting the flour concentration signal to the signal processing circuit, the signal processing circuit is used for processing the received signals and then transmitting the processed signals to the programmable controller, a flour concentration threshold value is arranged in the programmable controller, if the flour concentration signals received by the programmable controller are smaller than the flour concentration threshold value, the programmable controller triggers the pressure sensor to start operation, the pressure sensor is arranged at the bottom of the container (8), the pressure sensor is used for detecting flour weight signals and transmitting the detected signals to the programmable controller, at the moment, the programmable controller controls the second controller to control the second electromagnetic valve (5) to be opened, and the flour sucking device (7) sucks the flour at the bottom of the container (8); the flour processing process safety monitoring system further comprises the image sensor, the image sensor is used for detecting image information of flour to be processed in the processing process, the image sensor transmits the detected image information to the image processor, and the image processor performs image processing on the received image information and then transmits the processed image information to the programmable controller.
In the above embodiment, the present invention provides a flour processing process safety monitoring system, which comprises a feeding port, a first electromagnetic valve, a buffer hopper, a first filter screen, a second electromagnetic valve, a second filter screen, a powder suction device, a container, a dust sensor, a signal processing circuit, a pressure sensor, an image processor, a programmable controller, a first controller and a second controller, the flour in the container can be weighed and sucked out after being completely precipitated at the bottom of the container through the dust sensor and the signal processing circuit, so that not only can the accurate weight of the flour to be processed be returned, but also the safety in the processing process can be ensured, meanwhile, the image sensor and the image processor are adopted to effectively monitor the image information of the processing environment and the processing safety.
Specifically, the flour processing process safety monitoring system further comprises a display device, and the programmable controller transmits the received image information and the flour weight signal to the display device for displaying.
As shown in FIG. 3, the signal processing circuit includes resistors R1-R12, capacitors C1-C6, diodes D1-D4, and operational amplifiers A1-A3.
Wherein, the output end of the dust sensor is connected with one end of a resistor R1, the other end of the resistor R1 is connected with a power supply Vcc, one end of a resistor R2 is grounded, the other end of a resistor R2 is connected with one end of a resistor R1, one end of a resistor R1 is further connected with the non-inverting input end of an operational amplifier a1, one end of a capacitor C1 is grounded, the other end of a capacitor C1 is connected with one end of a resistor R4, the other end of a resistor R4 is connected with one end of a resistor R3, the other end of a resistor R3 is connected with the anode of a diode D2, one end of a resistor R3 is connected with the cathode of a diode D2, one end of a resistor R3 is further connected with the anode of a diode D1, one end of a resistor R3 is connected with the inverting input end of an operational amplifier a1, the cathode of a diode D1 is connected with the output end of an operational amplifier a1, the anode of a diode D2 is also connected with the output end of an operational amplifier a1, the output end of an operational amplifier a1 is connected with the non-inverting input end of an operational amplifier a2, one end of a capacitor C2 is grounded, the other end of a capacitor C2 is connected to one end of a resistor R7, the other end of a resistor R7 is connected to one end of a resistor R6, the other end of a resistor R6 is connected to the anode of a diode D4, the other end of a resistor R6 is connected to the cathode of a diode D3, the other end of a resistor R7 is connected to the cathode of a diode D7, the other end of a resistor R7 is connected to the anode of a diode D7, the other end of the resistor R7 is further connected to the inverting input terminal of an operational amplifier a 7, one end of a resistor R7 is connected to the output terminal of the operational amplifier a 7, the other end of the resistor R7 is connected to the cathode of the diode D7, one end of the resistor R7 is connected to the other end of the resistor R7, one end of the capacitor C7 is grounded, the other end of the resistor R7 is connected to one end of the inverting input terminal of the operational amplifier a 7, the other end of the resistor R7 is connected to one end of the inverting input terminal of the operational amplifier 7, one end of a capacitor C5 is connected with the inverting input end of the operational amplifier A3, the other end of a capacitor C5 is connected with the output end of the operational amplifier A3, one end of a resistor R10 is connected with the inverting input end of the operational amplifier A3, the other end of a resistor R10 is connected with the output end of the operational amplifier A3, one end of the capacitor C6 is grounded, the other end of a capacitor C6 is connected with the non-inverting input end of the operational amplifier A3, one end of a resistor R11 is grounded, the other end of the resistor R11 is connected with one end of a resistor R12, the other end of a resistor R11 is connected with the other end of the capacitor C6, the other end of the resistor R12 is connected with a power supply Vcc, and the output end of the operational amplifier A3 is connected with the input end of the programmable controller.
In the foregoing embodiment, the feedback loop of the first two stages of amplifying circuits of the signal processing circuit provided by the present invention is connected in series with a bidirectional limiting diode, which can prevent the amplifier from overloading when inputting a signal, and increase the dynamic range of signal amplification through circuit design.
Further, the resistance of the resistor R1 is 560k ohms, the resistance of the resistor R2 is 1M ohms, the resistance of the resistor R3 is 390k ohms, the resistance of the resistor R4 is 10k ohms, the resistance of the resistor R5 is 14k ohms, the resistance of the resistor R6 is 100k ohms, the resistance of the resistor R7 is 10k ohms, the resistance of the resistor R8 is 14k ohms, the resistance of the resistor R9 is 6.04k ohms, the resistance of the resistor R10 is 56.2k ohms, the resistance of the resistor R11 is 1M ohms, and the resistance of the resistor R12 is 560k ohms.
Furthermore, the capacitance of the capacitor C1 is 0.01 μ F, the capacitance of the capacitor C2 is 0.01 μ F, the capacitance of the capacitor C3 is 68pF, the capacitance of the capacitor C4 is 0.01 μ F, the capacitance of the capacitor C5 is 68pF, and the capacitance of the capacitor C6 is 0.01 μ F.
As shown in fig. 4, the image processor performs image processing on the image information collected by the image sensor, and the image processor is suitable for noise elimination of the image information, and can save the detail information of the image while eliminating the noise.
The image processor comprises an estimation unit, a noise detection unit and a spatial noise filter, the image sensor, the estimation unit, the noise detection unit and the spatial noise filter are sequentially connected, the output end of the image sensor is connected with the input end of the spatial noise filter, and the output end of the noise detection unit is connected with the input end of the programmable controller.
The estimation unit is configured to estimate a local variance of each pixel of the input image information Vi, and calculate a noise threshold Th according to a state of the local variance.
The estimation unit calculates the local variance value by taking its neighboring pixels for each pixel in the image information Vi to calculate the local variance value of the pixel, and the total number of the pixel and its neighboring pixels may be n.
The evaluation unit calculates the local variance values and determines the associated reference values that represent the state of the local variance values.
The estimation unit takes a preset target pixel of the image information Vi as a center pixel, and constructs a Sudoku area by taking the center pixel as the center to calculate local variance values, and if the nine pixel values are P1-P9, the local variance values are
Calculating the absolute difference values of nine pixels as follows:
then the local variance value var is obtained:
the estimation unit transmits the calculated local variance value var to the noise detection unit, a variance value threshold is stored in the noise detection unit, if the local variance value received by the noise detection unit is larger than the variance threshold, the noise detection unit transmits image information Vi to the spatial noise filter, and if the local variance value received by the noise detection unit is smaller than the variance threshold, the noise detection unit transmits the image information Vi to the programmable controller.
The spatial noise filter performs image filtering processing on the received image information, and specifically comprises the following steps:
step S1: a region of a predetermined size, for example, a3 × 9 region, is fetched for the image of the received image signal Vi.
Step S2: and with the central pixel as a central pixel, different weighted values W are distributed to different pixels in the area.
Step S3: filtering the image information according to the weight values, and then outputting pixel information outputpixel (i, j):
wherein the content of the first and second substances,
is a regionThe weight value of each pixel within the pixel,
the pixel values of the pixel points in the region are obtained.
Step S4: returning to step S1 until the output values of all pixels are calculated, the output image information V is generated to the programmable controller.
Specifically, a temperature sensor and a temperature adjusting device are further arranged in the container (8), the temperature sensor collects temperature information in the container (8) and transmits the collected temperature information to the programmable controller, a temperature threshold range is stored in the programmable controller, and if the temperature information received by the programmable controller is not in the temperature threshold range, the programmable controller controls the temperature adjusting device to adjust the temperature to the temperature threshold range.
Specifically, still be provided with a humidity transducer and humidity control device in container (8), humidity transducer gathers the humidity information in container (8) to with the humidity information transmission who gathers extremely programmable controller, the programmable controller is internal to be stored with the humidity threshold value scope, if the humidity information that programmable controller received is not in the humidity threshold value scope, then programmable controller control humidity control device adjusts humidity extremely the humidity threshold value scope.
Specifically, the programmable controller is in wireless connection with the first controller, the programmable controller is in wireless connection with the second controller, the first controller is in wireless connection with the first electromagnetic valve (2), and the second controller is in wireless connection with the second electromagnetic valve (5).
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and are not limited. Although the present invention has been described in detail with reference to the embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (5)
1. The flour processing process safety monitoring system is characterized by comprising a feeding hole (1), a first electromagnetic valve (2), a buffer hopper (3), a first filter screen (4), a second electromagnetic valve (5), a second filter screen (6), a powder suction device (7), a container (8), a dust sensor, a signal processing circuit, a pressure sensor, an image processor, a programmable controller, a first controller and a second controller;
the output end of the dust sensor is connected with the input end of the signal processing circuit, the output end of the pressure sensor is connected with the input end of the programmable controller, the output end of the signal processing circuit is connected with the input end of the programmable controller, the output end of the image sensor is connected with the input end of the image processor, the output end of the image processor is connected with the input end of the programmable controller, the input end of the first controller is connected with the output end of the programmable controller, and the input end of the second controller is connected with the output end of the programmable controller;
wherein, the flour to be processed is transmitted to the feed inlet (1), at the moment, the programmable controller controls the first controller to control the first electromagnetic valve (2) to be opened, the flour to be processed enters the buffer hopper (3) through the feed inlet (1), a first filter screen (4) is arranged at the connecting part of the buffer hopper (3) and the container (8), the flour to be processed enters the container (8) through the first filter screen (4), the second filter screen (6) is arranged in the container (8), the flour to be processed enters the bottom of the container (8) through the second filter screen (6), the dust sensor is arranged at the bottom of the container (8) and is used for detecting a flour concentration signal in the air in the container (8) and transmitting the flour concentration signal to the signal processing circuit, the signal processing circuit is used for processing the received signals and then transmitting the processed signals to the programmable controller, a flour concentration threshold value is arranged in the programmable controller, if the flour concentration signals received by the programmable controller are smaller than the flour concentration threshold value, the programmable controller triggers the pressure sensor to start operation, the pressure sensor is arranged at the bottom of the container (8), the pressure sensor is used for detecting flour weight signals and transmitting the detected signals to the programmable controller, at the moment, the programmable controller controls the second controller to control the second electromagnetic valve (5) to be opened, and the flour sucking device (7) sucks the flour at the bottom of the container (8); the flour processing process safety monitoring system also comprises the image sensor, the image sensor is used for detecting image information of flour to be processed in the processing process, the image sensor transmits the detected image information to the image processor, and the image processor performs image processing on the received image information and then transmits the processed image information to the programmable controller;
the signal processing circuit comprises resistors R1-R12, capacitors C1-C6, diodes D1-D4 and operational amplifiers A1-A3;
wherein, the output end of the dust sensor is connected with one end of a resistor R1, the other end of the resistor R1 is connected with a power supply Vcc, one end of a resistor R2 is grounded, the other end of a resistor R2 is connected with one end of a resistor R1, one end of a resistor R1 is further connected with the non-inverting input end of an operational amplifier a1, one end of a capacitor C1 is grounded, the other end of a capacitor C1 is connected with one end of a resistor R4, the other end of a resistor R4 is connected with one end of a resistor R3, the other end of a resistor R3 is connected with the anode of a diode D2, one end of a resistor R3 is connected with the cathode of a diode D2, one end of a resistor R3 is further connected with the anode of a diode D1, one end of a resistor R3 is connected with the inverting input end of an operational amplifier a1, the cathode of a diode D1 is connected with the output end of an operational amplifier a1, the anode of a diode D2 is also connected with the output end of an operational amplifier a1, the output end of an operational amplifier a1 is connected with the non-inverting input end of an operational amplifier a2, one end of a capacitor C2 is grounded, the other end of a capacitor C2 is connected to one end of a resistor R7, the other end of a resistor R7 is connected to one end of a resistor R6, the other end of a resistor R6 is connected to the anode of a diode D4, the other end of a resistor R6 is connected to the cathode of a diode D3, the other end of a resistor R7 is connected to the cathode of a diode D7, the other end of a resistor R7 is connected to the anode of a diode D7, the other end of the resistor R7 is further connected to the inverting input terminal of an operational amplifier a 7, one end of a resistor R7 is connected to the output terminal of the operational amplifier a 7, the other end of the resistor R7 is connected to the cathode of the diode D7, one end of the resistor R7 is connected to the other end of the resistor R7, one end of the capacitor C7 is grounded, the other end of the resistor R7 is connected to one end of the inverting input terminal of the operational amplifier a 7, the other end of the resistor R7 is connected to one end of the inverting input terminal of the operational amplifier 7, one end of a capacitor C5 is connected with the inverting input end of an operational amplifier A3, the other end of a capacitor C5 is connected with the output end of the operational amplifier A3, one end of a resistor R10 is connected with the inverting input end of the operational amplifier A3, the other end of a resistor R10 is connected with the output end of the operational amplifier A3, one end of the capacitor C6 is grounded, the other end of a capacitor C6 is connected with the non-inverting input end of the operational amplifier A3, one end of a resistor R11 is grounded, the other end of the resistor R11 is connected with one end of a resistor R12, the other end of the resistor R11 is connected with the other end of the capacitor C6, the other end of the resistor R12 is connected with a power supply Vcc, and the output end of the operational amplifier A3 is connected with the input end of the programmable controller;
the image processor carries out image processing on the image information acquired by the image sensor, and the image processor is suitable for noise elimination of the image information;
the image processor comprises an estimation unit, a noise detection unit and a spatial noise filter, the image sensor, the estimation unit, the noise detection unit and the spatial noise filter are sequentially connected, the output end of the image sensor is connected with the input end of the spatial noise filter, and the output end of the noise detection unit is connected with the input end of the programmable controller;
the estimation unit is used for estimating the local variance value of each pixel of the input image information Vi, the estimation unit takes a preset target pixel of the image information Vi as a central pixel and constructs a Sudoku area by taking the central pixel as the center to calculate the local variance value, and the nine pixel values are P1-P9, namely
Calculating the absolute difference values of nine pixels as follows:
then the local variance value var is obtained:
the estimation unit transmits the calculated local variance value var to the noise detection unit, a variance value threshold is stored in the noise detection unit, if the local variance value received by the noise detection unit is greater than the variance threshold, the noise detection unit transmits image information Vi to the spatial noise filter, and if the local variance value received by the noise detection unit is less than the variance threshold, the noise detection unit transmits the image information Vi to the programmable controller;
the spatial noise filter carries out image filtering processing on the received image information, and transmits the processed image information to the programmable controller;
the spatial noise filter performs image filtering processing on the received image information, and specifically comprises the following steps:
step S1: taking out an area with a preset size from an image of a received image signal Vi;
step S2: distributing different weighted values W to different pixels in the area by taking the central pixel as a central pixel;
step S3: filtering the image information according to the weight values, and then outputting pixel information outputpixel (i, j):
wherein the content of the first and second substances,
the weight values for each pixel within the region,
the pixel value of each pixel point in the region is obtained;
step S4: returning to step S1 until the output values of all pixels are calculated, the output image information V is generated to the programmable controller.
2. The flour processing process safety monitoring system according to claim 1, further comprising a display device, wherein the programmable controller transmits the received image information and the flour weight signal to the display device for display.
3. The flour processing process safety monitoring system according to claim 1, wherein a temperature sensor and a temperature adjusting device are further arranged in the container (8), the temperature sensor collects temperature information in the container (8) and transmits the collected temperature information to the programmable controller, a temperature threshold range is stored in the programmable controller, and if the temperature information received by the programmable controller is not in the temperature threshold range, the programmable controller controls the temperature adjusting device to adjust the temperature to the temperature threshold range.
4. The flour processing process safety monitoring system according to claim 1, wherein a humidity sensor and a humidity adjusting device are further arranged in the container (8), the humidity sensor collects humidity information in the container (8) and transmits the collected humidity information to the programmable controller, a humidity threshold range is stored in the programmable controller, and if the humidity information received by the programmable controller is not in the humidity threshold range, the programmable controller controls the humidity adjusting device to adjust humidity to the humidity threshold range.
5. The flour processing process safety monitoring system according to claim 1, wherein the programmable controller is wirelessly connected with the first controller, the programmable controller is wirelessly connected with the second controller, the first controller is wirelessly connected with the first electromagnetic valve (2), and the second controller is wirelessly connected with the second electromagnetic valve (5).
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| CN108061695A (en) * | 2017-11-07 | 2018-05-22 | 无锡艾科瑞思产品设计与研究有限公司 | A kind of dust concentration detection device |
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| CN109100275A (en) * | 2018-08-06 | 2018-12-28 | 山东科技大学 | A kind of flour workshop dust concentration intelligent alarming control system |
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Denomination of invention: Flour processing safety monitoring system Granted publication date: 20220325 Pledgee: Agricultural Bank of China Huaiyuan County Branch Pledgor: Huaiyuan Tianxue flour Co.,Ltd. Registration number: Y2024980008047 |
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