CN110702768B - Bionic olfaction detection equipment and method for dynamic nondestructive agricultural product quality assembly line - Google Patents
Bionic olfaction detection equipment and method for dynamic nondestructive agricultural product quality assembly line Download PDFInfo
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Abstract
The invention discloses bionic olfactory detection equipment and method capable of achieving dynamic nondestructive production line of agricultural product quality. The equipment comprises a product conveying system, a product smell collecting system and a data collecting and processing system; the product conveying system is used for conveying products in a production line; the product smell collecting system is used for collecting smell volatile gases of dynamic products of the assembly line; the data acquisition and processing system is used for performing bionic olfactory sensing response on the collected odor volatile gas, and acquiring and analyzing the response signals; a hood transfer system for transferring a hood is also included. The equipment can finish the pipeline dynamic nondestructive testing of the quality of agricultural products; meanwhile, aiming at different detection objects, the bionic olfactory gas sensor and the detection model are replaced in a targeted manner, so that the equipment has universality in the field of pipeline dynamic nondestructive detection of agricultural product quality. The method can effectively and rapidly finish the pipeline dynamic nondestructive testing of the quality of agricultural products.
Description
Technical Field
The invention relates to the technical field of nondestructive testing of agricultural products, in particular to a dynamic nondestructive testing device and method for an agricultural product quality assembly line based on a bionic olfaction technology, and specifically relates to a dynamic nondestructive bionic olfaction testing device and method for an agricultural product quality assembly line.
Background
The traditional detection of the quality of the agricultural products is realized by random sampling, which causes irreparable damage to the agricultural products, and has complex operation, higher cost and high labor intensity, and can not meet the commercial processing requirement of the production of the agricultural products. The existing nondestructive testing technology comprises a bionic olfaction technology, a spectrum technology, machine vision and the like, and different detection means acquire quality-related characteristic information of agricultural products from different angles, so that the quality state of a tested object is judged. Therefore, the existing detection means have advantages and disadvantages and have unique advantages. So far, the techniques of spectrum and machine vision have realized pipeline detection. However, the bionic olfaction detection is limited by time caused by the operation processes of sensor cleaning, gas collection, sampling and the like, and the bionic olfaction technology at the present stage is mostly used for rapid detection and analysis in a laboratory, and has the advantages of simple sample pretreatment, sensitive response, high analysis speed, low analysis cost and the like compared with the smell sample analysis equipment such as gas chromatography and the like, but is difficult to meet the requirement of on-line detection of a production line.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a dynamic nondestructive testing device for an agricultural product quality pipeline based on a bionic olfaction technology, in particular to a dynamic nondestructive bionic olfaction testing device for the agricultural product quality pipeline. The equipment can realize on-line and automatic detection and identification of the quality of the agricultural products, and can not damage the agricultural products.
The invention also aims to provide a dynamic nondestructive testing method for the agricultural product quality assembly line based on the bionic olfaction technology, in particular to a dynamic nondestructive bionic olfaction testing method for the agricultural product quality assembly line.
The aim of the invention is achieved by the following technical scheme.
A dynamic nondestructive bionic olfactory detection device for an agricultural product quality assembly line comprises a product conveying system, a product odor collecting system and a data collecting and processing system;
The product conveying system is used for conveying products in a production line; the product odor collecting system is used for collecting odor volatile gas of the assembly line dynamic products conveyed on the product conveying system; the product smell collecting system is connected with the data collecting and processing system through a gas channel;
The data acquisition and processing system comprises an electronic nose and a computer; the electronic nose is communicated with the gas channel and can perform bionic olfactory sensing response on the odor volatile gas collected by the product odor collecting system; the computer is connected with the electronic nose and contains information acquisition and data analysis software, so that the response signal of the electronic nose can be analyzed and processed;
The computer is also connected with the product conveying system; the computer comprises a precise linear and switching power supply module and a driving and controlling circuit module, and can control the opening and transmission speed of the product conveying system.
Preferably, the gas channel is made of a hose material without peculiar smell, more preferably a composite material of PVC (polyvinyl chloride) and polytetrafluoroethylene, or the outer layer is a PVC hose, and the inner layer is coated with polytetrafluoroethylene material; and the connection section of the gas channel between the product scent collection system and the data collection and processing system is bendable and movable.
Preferably, the electronic nose is mainly composed of three functional devices, namely a sampling manipulator, a gas sensor array and a signal processing system.
The sampling manipulator, namely the gas path flow control system, is mainly composed of an automatic sample injection pump and a flow controller, and ensures the stability of the air flow in the electronic nose under various complex conditions, so that the electronic nose can be normally used under various complex conditions such as a laboratory, on-line control, an open environment and the like, and plays a role similar to a nose of a person.
More preferably, the gas sensor array is a gas sensor array, and the electronic nose uses ten different metal oxide sensors as the gas sensor array.
Preferably, the computer comprises a computer main board, a data acquisition card, a hard disk, a network card, a display card and a display, and comprises a precise linear and switching power supply module, a driving and control circuit module and information acquisition and data analysis software. The information acquisition and data analysis software has popular algorithms such as ED Euclidean distance, MD horse type distance, PCA principal component analysis, LDA linear discriminant analysis, K-NN (K nearest neighbor algorithm), PLS partial least square method, BPNN (BP neural network) and the like.
When the electronic nose is in operation, the automatic sample injection pump of the sampling operator in the electronic nose works, volatile gas collected by the product smell collecting system is pumped into the annular detection cavity of the electronic nose through the gas channel, and the gas sensor array of the electronic nose collects information of the gas in the annular detection cavity, namely chemical input is converted into response electric signals; after the electronic nose collects the gas information, the computer immediately performs data processing, including extracting useful sensor information; feature extraction, normalization, dimension reduction is carried out on the extracted features, and the main components of sensor array information are extracted; pattern recognition, namely establishing a neural network according to the extracted sensor array signal main components, training the neural network by using a large amount of data of a database, and determining a neural network model and parameters; and judging the mode of the collected odor volatile gas, and outputting a result.
Preferably, the product conveying system comprises a conveying belt, a conveying motor and a conveying support frame; the conveying belt is arranged on the conveying support frame through a belt pulley and driven by the conveying motor to carry out conveying operation; the conveying motor is connected with the computer.
Preferably, the product odor collection system comprises a gas collection hood; an air inlet communicated with the atmosphere is formed in the top of the gas collecting hood and near the edge of the gas collecting hood; an air outlet is formed in the top of the gas collecting hood and at one side away from the air inlet; the air outlet is communicated with one end of the air channel, and the other end of the air channel is communicated with the electronic nose.
More preferably, an air filter is installed at the inlet end of the air inlet in a connecting way, and activated carbon adsorbent is filled in the air filter for filtering air.
More preferably, the outlet end of the air outlet is provided with a sample injector, and the sample injector is in sealing connection with the air channel;
The sample injector comprises an air inlet needle head and a high polymer filter screen; the sample injector is arranged at the outlet end of the air outlet through a rubber plug; the rubber plug is inlaid on the outlet end of the air outlet, the air inlet needle head of the sample injector penetrates through the rubber plug and is communicated to the inner side of the inlet end of the air outlet, and the high-molecular filter sieve is located outside the rubber plug and is in sealing connection with the air channel.
Still more preferably, the rubber stopper is made of butyl rubber.
More preferably, the product conveying system is provided with a matched tray which is used for containing products and can be matched with the bottom of the gas collecting hood in a sealing way.
Still more preferably, the material of the matched tray is a magnetic material; the bottom of the gas collecting hood is embedded with a magnetic material; the bottom of the gas collecting hood is in sealing fit with the magnetic attraction effect of the matched tray through the magnetic attraction material.
More preferably, a magnetic suspension joint is arranged in the middle of the top of the gas collecting hood; the outside of the product conveying system is also provided with a gas collecting hood transfer system;
The gas collecting hood transfer system comprises a motor, a support frame, a swing arm and an electromagnetic chuck; one end of the swing arm can be rotatably arranged on the support frame in a shaft-winding way, and the motor is in transmission connection with one end of the swing arm which can be rotatably arranged in a shaft-winding way and can drive the swing arm to swing around the shaft; the electromagnetic chuck is arranged at the other end of the swing arm and is positioned above the production line of the product conveying system and can be used for magnetically adsorbing the magnetic hanging joint; the electromagnetic chuck is electrified to generate magnetic force, and the electromagnetic chuck is powered off without magnetic force;
After the electromagnetic chuck magnetically adsorbs the magnetic hanging connector, the swing arm is driven by the motor to swing around the shaft, so that the gas collecting hood can be subjected to position transfer on the production line of the product conveying system.
Still more preferably, the swing arm is a double rocker mechanism; one end of a driving rod of the double rocker mechanism can be arranged on the supporting frame in a rotating mode around a shaft, the motor is in transmission connection with one end of the driving rod in a rotating mode around the shaft, and the electromagnetic chuck is arranged at the other end of the driving rod.
Still more preferably, the motor is in transmission connection with the swing arm through a worm gear mechanism.
Still more preferably, the power supply of the electromagnetic chuck is controlled to be on-off by a singlechip control chip; each parameter is implanted in the singlechip control chip; the motor and the singlechip control chip are respectively connected with the computer. A dynamic nondestructive bionic olfaction detection method for an agricultural product quality assembly line adopts any one of the equipment to detect, and comprises the following steps:
(1) Carrying out pipeline conveying on agricultural products;
(2) Collecting odor volatile gas of agricultural products dynamically conveyed on a pipeline, sucking the odor volatile gas by an electronic nose, and performing sensing response;
(3) After the computer collects the response signals of the electronic nose, the response signals are processed and analyzed, and the result is output;
(4) Cleaning an electronic nose;
(5) And (5) repeating the steps (2) - (4), and finishing quality detection on the agricultural products dynamically conveyed on the assembly line one by one.
Preferably, the time for the electronic nose to suck and conduct sensing response is 5-8 s, and more preferably 5s.
Preferably, the time for cleaning the electronic nose is 5-10 s, more preferably 5-8 s.
Preferably, the detection period of one agricultural product is 20s.
Compared with the prior art, the invention has the following advantages and beneficial effects:
(1) The device has ingenious design, combines the electronic nose with computer control and data analysis, and is connected with a computer to record, analyze and output results; in addition, the computer controlled electronic nose solves the problem of complex circuit caused by the adoption of mechanical keys, and meanwhile, the information of the detection process can be displayed in detail, so that the interactivity with the electronic nose is improved, and the electronic nose has better adaptability in the on-site rapid detection of agricultural products.
(2) In the equipment, the detachable portable gas collecting hood in the product smell collecting system has the capability of detecting various agricultural products, and in the pipeline detection, the detection can be performed by replacing a specific gas collecting hood, adjusting the height of the swing arm in the gas collecting hood transfer system and replacing a specific bionic smell gas sensor aiming at different detection objects, so that the universality is high, and the application range of the electronic nose detection is enlarged.
(3) The equipment can realize the dynamic nondestructive testing of the production line of the quality of the agricultural products, effectively save manpower, material resources and financial resources and greatly improve the working efficiency of the quality testing of the agricultural products.
(4) The detection method is realized based on the detection equipment, can effectively and rapidly finish the dynamic nondestructive detection of the production line of the quality of agricultural products, and reduces the adoption time.
Drawings
FIG. 1 is an isometric view of a dynamic nondestructive bionic olfactory detection apparatus for an agricultural product quality pipeline in accordance with an embodiment of the present invention;
FIG. 2 is a schematic perspective view of a data acquisition and processing system;
FIG. 3 is a schematic perspective view of a product delivery system;
FIG. 4 is a schematic perspective view of a product odor collection system;
FIG. 5 is a schematic perspective view of a gas hood;
FIG. 6a is a schematic diagram of a hood transfer system;
FIG. 6b is a schematic elevational view of a hood transfer system;
FIG. 7 is a schematic view of a dual rocker mechanism in a hood transfer system;
The drawings are marked: 1-product conveying system, 11-conveyor belt, 12-conveying motor, 13-conveying support frame, 2-product smell collecting system, 21-gas collecting hood, 211-magnetic hanging connector, 212-gas inlet, 213-gas outlet, 22-air filter, 23-sample injector, 24-rubber plug, 25-matched tray, 3-data collecting and processing system, 31-electronic nose, 32-computer, 4-gas channel, 5-gas collecting hood transferring system, 51-motor, 52-support frame, 53-swing arm, 531-driving rod, 532-driven rod, 533-connecting rod I, 534-connecting rod II, 54-electromagnetic chuck, 55-worm gear and worm mechanism, 551-worm gear, 552-worm, 56-single chip microcomputer control chip, 57-mounting plate, 6-workbench.
Detailed Description
In order to more specifically describe the present invention, the following detailed description of the technical solution of the present invention is given with reference to the accompanying drawings and the specific embodiments, but the scope of the present invention is not limited thereto. In the description of the embodiments of the present invention, it should be noted that, the terms "upper," "lower," "inner," "outer," and the like indicate an orientation or a positional relationship based on the orientation or the positional relationship shown in the drawings, or the orientation or the positional relationship in which the inventive product is conventionally put in use, are merely used for distinguishing the description, only for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or element to be referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention, but rather as indicating or implying relative importance.
Example 1
Referring to fig. 1, the dynamic nondestructive testing device for the agricultural product quality pipeline based on the bionic olfaction technology in the embodiment is shown. The apparatus comprises a product delivery system 1, a product odour collection system 2 and a data acquisition and processing system 3.
Wherein the product conveying system 1 is used for conveying products in a production line; the product smell collecting system 2 is used for collecting smell of the dynamic product in the production line conveyed on the product conveying system 2, and the product smell collecting system 2 moves synchronously with the product in the product conveying system 1 during the collection process. The data acquisition and processing system 3 is used for performing bionic olfactory sensing response on the smell collected by the product smell collection system 2, and acquiring and analyzing the response signal.
Specifically, the product smell collecting system 2 is connected with the data collecting and processing system 3 through a gas channel 4; wherein, the gas channel 4 is a soft flame-retardant non-shrink sleeve, and has good electrical and physical properties, acid resistance, corrosion resistance and excellent flame retardance.
In this embodiment, the gas channel 4 is made of a hose material without peculiar smell, more preferably a composite material of PVC and polytetrafluoroethylene, or an outer layer is a PVC hose, and an inner layer is coated with polytetrafluoroethylene material. And when the odor collecting system 2 and the agricultural products synchronously move and collect the odor volatile gas of the agricultural products, the connecting end of the gas channel 4 and the odor collecting system 2 also synchronously move, so that the connecting section of the gas channel 4 between the product odor collecting system 2 and the data collecting and processing system 3 can be bent and moved, thereby avoiding hard breakage of the gas channel 4. In addition, in a specific use process, the connection end of the gas channel 4 and the odor collecting system 2 also move synchronously, and the gas channel 4 needs to be reserved with a sufficient length according to actual conditions so as to prevent the pipeline from falling off.
Referring to fig. 2, the data collecting and processing system 3 includes an electronic nose 31 and a computer 32, and the electronic nose 31 and the computer 32 are both disposed on the workbench 6. The electronic nose 31 is communicated with the gas channel 4 and can perform bionic olfactory sensing response on the gas transmitted by the gas channel 4; the computer 32 is connected with the electronic nose 31, and includes information acquisition and data analysis software for analyzing and processing the response signal of the electronic nose 31.
The electronic nose 31 mainly comprises three functional devices of a sampling manipulator, a gas sensor array and a signal processing system. The sampling operator, namely the gas path flow control system, is mainly composed of an automatic sample injection pump and a flow controller, and ensures the stability of the air flow in the electronic nose 31 under various complex conditions, so that the electronic nose 31 can be normally used under various complex conditions such as a laboratory, on-line control, an open environment and the like, and plays a role similar to a nose of a person. In the present embodiment, ten different metal oxide sensors are used as the sensor array by the electronic nose 31, and the characteristic extraction mode of each sensor includes an average differential value, a maximum value or an integral value. When aiming at different detection objects, the specific bionic olfactory gas sensor can be replaced, the universality is high, the application range of the electronic nose detection is widened in actual operation, and all equipment is required to be placed in a separate dust removing chamber because the gas sensor of the electronic nose 31 is sensitive, and the equipment is required to be sterile, nontoxic and odorless.
In the present embodiment, the computer 32 specifically includes a computer motherboard, a data acquisition card, a hard disk, a network card, a display card, and a display, and includes a precise linear and switching power module, a driving and control circuit module, and information acquisition and data analysis software. The information acquisition and data analysis software has popular algorithms such as ED Euclidean distance, MD horse type distance, PCA principal component analysis, LDA linear discriminant analysis, K-NN (K nearest neighbor algorithm), PLS partial least square method, BPNN (BP neural network) and the like.
When the electronic nose 31 is in operation, the automatic sample injection pump of the sampling operator in the electronic nose 31 works, volatile gas collected by the product smell collecting system 2 is pumped into the annular detection cavity of the electronic nose 31 through the gas channel, and the gas sensor array of the electronic nose 31 collects information of the gas in the annular detection cavity, namely chemical input is converted into response electric signals; after the electronic nose 31 collects the gas information, the computer 32 immediately performs data processing, including extracting useful sensor information; feature extraction, normalization, dimension reduction is carried out on the extracted features, and the main components of sensor array information are extracted; pattern recognition, namely establishing a neural network according to the extracted sensor array signal main components, training the neural network by using a large amount of data of a database, and determining a neural network model and parameters; and judging the mode of the collected odor volatile gas, and outputting a result.
The electronic nose 31 is combined with the control of the computer 32 and the data analysis, and is connected with the computer 32 to record, analyze and output the result, so that the design is ingenious; moreover, the computer 32 controls the electronic nose 31, so that the problem of complex circuit caused by the adoption of mechanical keys is solved, meanwhile, the information of the detection process can be displayed in detail, the interactivity with the electronic nose 31 is improved, and the electronic nose 31 has better adaptability in the on-site rapid detection of agricultural products.
When the device of the embodiment is used for carrying out dynamic nondestructive inspection on agricultural product quality production lines, the agricultural products are conveyed by the product conveying system 1 in the production lines, the product odor collecting system 2 collects odor volatile gases of the agricultural products moving on the product conveying system 1 one by one, the electronic nose 31 pumps the collected odor volatile gases through the gas channel 4 and senses the responses, and then the computer 32 collects, analyzes and processes response signals of the electronic nose 31 and outputs results.
The product delivery system 1 is also connected to the computer 32; and the computer 32 contains a precision linear and switching power supply module and a drive and control circuit module. In this way, the opening of the product conveying system 1 and the speed of conveying agricultural products can be controlled by the computer 32, and the coordination and the consistency with the work of the data acquisition and processing system 3 can be ensured, so that the detection of each agricultural product can be ensured, the analysis and processing result of the data acquisition and processing system 3 can be ensured to correspond to the agricultural products conveyed on the product conveying system 1 one by one, and the detection accuracy is improved.
Example 2
The present embodiment is the same as embodiment 1, further referring to fig. 3, the product conveying system 1 includes a conveyor belt 11, a conveying motor 12, and a conveying support frame 13; the conveyor belt 11 is mounted on a conveying support frame 13 through a belt pulley, and is driven by the conveying motor 12 to perform conveying operation. When the agricultural product conveying device works, agricultural products to be detected are placed on the conveying belt 11, and the conveying motor 12 is started, so that the agricultural products can be stably conveyed.
Further, the conveyance motor 12 is connected to the computer 32. The computer 32 contains a precise linear and switching power supply module and a driving and controlling circuit module, and can precisely control the conveying motor 12, so that the starting of the conveying motor 12 and the conveying speed of agricultural products can be controlled, the conveying speed of the agricultural products is ensured to be consistent with the working coordination of the data acquisition and processing system 3, and the detection accuracy is improved.
Example 3
This embodiment is the same as embodiment 1 or embodiment 2, further referring to fig. 4, the product scent collection system 2 includes a gas collection hood 21. In this embodiment, the gas-collecting hood 21 is made of a transparent material having no odor.
Further, as shown in fig. 5, an air inlet 212 communicating with the atmosphere is provided near the edge on the top of the gas collecting hood 21; and an air outlet 213 is provided on the top of the gas collecting channel 21 at a side remote from the air inlet 212. The air outlet is communicated with one end of the air channel 4, and the other end of the air channel 4 is communicated with the data collecting and processing system 3.
An air cleaner 22 is attached to an inlet end of the air intake 212. Specifically, in this embodiment, the air cleaner is filled with activated carbon adsorbent for filtering air.
And the outlet end of the air outlet 213 is provided with a sample injector 23, and the sample injector 23 comprises an air inlet needle and a polymer filter screen. The injector 23 is disposed at an outlet end of the air outlet 213 through a rubber plug 24, and in this embodiment, the rubber plug 24 is made of butyl rubber. Specifically, the rubber plug 24 is embedded in the outlet end of the air outlet 213, the air inlet needle of the injector 23 passes through the rubber plug 24 and is communicated to the inner side of the inlet end of the air outlet 213, and the polymer filter sieve is located outside the rubber plug 24 and is in sealing connection with the air channel 24. When the electronic nose 31 sucks gas from the gas collecting hood 21 through the gas channel 4, the gas in the gas collecting hood 21 reaches the polymer filter sieve through the gas inlet needle, solid impurities are filtered, the gas substances entering the gas channel 4 are ensured, and the impurities are prevented from entering the gas channel 4 and the electronic nose 31. Moreover, the joint between the injector 23 and the gas channel 4 is tightly sealed, so that falling off can be effectively prevented.
When the electronic nose 31 is in operation, the automatic sample injection pump of the sampling operator works, the gas collecting cover 21 is sucked through the gas channel 4, air is filtered by the air filter 22 on the air inlet 212 and then enters the gas collecting cover 21 to keep the balance of the air pressure in the cover, and the tested sample gas volatile matters flow out of the sample injector 23 on the air outlet 213 and enter the annular detection cavity of the electronic nose 31 through the gas channel 4. In this process, the volatile gas of the agricultural product smell in the gas collecting hood 21 enters the electronic nose 31 along with the air flowing through the gas collecting hood 21 during the suction process, thereby completing the complete collection process of the agricultural product smell.
Furthermore, a matching tray 25 for holding products is provided on the product conveyor system 1. The supporting tray 25 is used for containing agricultural products when the product conveying system 1 conveys the agricultural products, and the supporting tray 25 can be matched with the bottom of the gas collecting hood 21 in a sealing way, so that the purpose of sealing and air tightness is achieved, and therefore when the gas collecting hood 21 is subjected to gas sucking operation, the gas collecting hood 21 cannot generate air leakage phenomenon, and the detection accuracy is improved.
Specifically, the material of the supporting tray 25 is a magnetic material; and a circle of magnetic material is embedded at the bottom of the gas-collecting hood 21. The bottom of the gas-collecting hood 21 can be in sealing fit with the matched tray 25 through the magnetic attraction effect of the magnetic attraction material, so that the gas-collecting hood 21 is more compact and reliable when combined with the matched tray 25. Moreover, the magnetic attraction force between the bottom of the gas collecting hood 21 and the matched tray 25 is far smaller than the gravity of the matched tray 25, so that the gas collecting hood 21 can be easily lifted independently without the phenomenon that the matched tray 25 and the gas collecting hood 21 are lifted together.
Example 4
This embodiment is the same as embodiment 3, further, referring to fig. 4 and 5, a magnetic suspension joint 211 is disposed at a middle position of the top of the gas collecting hood 21. And the outside of the product conveying system 1 is also provided with a gas collecting hood transfer system 5 which is used for magnetically attracting the magnetic hanging joint 211 and transferring the position of the gas collecting hood 21, so that the gas collecting hood 21 can collect odor volatile gas of the dynamic agricultural products in the production line on the product conveying system 1 one by one.
Referring to fig. 6a and 6b, the hood transfer system 5 includes a motor 51, a support bracket 52, a swing arm 53, and an electromagnetic chuck 54. In this embodiment, the motor 51 is mounted on the support frame 52 through a mounting plate 57, and one end of the swing arm 53 is rotatably disposed on the mounting plate 57 through a rotating shaft, and the motor 51 is in driving connection with the rotatable end of the swing arm 53 and can drive the swing arm 53 to swing around the shaft.
And the electromagnetic chuck 54 is disposed on the other end of the swing arm 53 and above the production line of the product conveying system 1, and is used for magnetically attracting the magnetic suspension joint 211. The electromagnetic chuck 54 is an electromagnetic chuck, and comprises a bracket, an iron core supported by the bracket, a coil and a panel, wherein the coil is wound on the iron core to form an electromagnet, the panel is positioned at the end of the iron core and can be conducted by the iron core to have electromagnetic property, and when the electromagnetic chuck is in operation, the coil is electrified to enable the iron core to generate electromagnetic property and enable the panel to have electromagnetic property, so that magnetic attraction can be generated on the magnetic suspension joint 211. The electromagnetic chuck 54 is electrified to generate magnetic force, and is powered off without magnetic force.
In this embodiment, the power supply of the electromagnetic chuck 54 is controlled to be turned on or off by the singlechip control chip 56; wherein, various parameters are implanted in the singlechip control chip 56, thereby controlling the working state of the electromagnetic chuck 54.
After the electromagnetic chuck 54 magnetically attracts the magnetic suspension joint 211, the swing arm 53 is driven to swing around the shaft by the motor 51, so that the gas-collecting hood 21 can be shifted in position on the production line of the product conveying system 1.
Specifically, referring to fig. 7, in the present embodiment, the swing arm 53 is a double-rocker mechanism, which includes a driving lever 531, a driven lever 532, a link i 533, and a link ii 534.
One end of the driving rod 531 of the double-rocker mechanism is rotatably disposed on the mounting plate 57 via a rotating shaft, the motor 51 is in transmission connection with one end of the driving rod 531 capable of rotating around the shaft, and the electromagnetic chuck 54 is disposed on the other end of the driving rod 531. One end of the connecting rod I533 is fixedly arranged on the rotating shaft, the other end of the connecting rod I533 is connected with one end of the driven rod 532, the other end of the driven rod 532 is connected with one end of the connecting rod II 534, and the other end of the connecting rod II 534 is connected with one end of the driving rod 531, which is provided with the electromagnetic chuck 54.
The motor 51 is connected to the swing arm 53 by a worm gear 55. Specifically, in this embodiment, the output end of the motor 51 is connected to a worm 552, and one end of the driving lever 531 of the swing arm 53 of the double-rocker mechanism, which can rotate around the shaft, is connected to a turbine 551, which can rotate coaxially and synchronously.
Thus, when the gas hood transfer system 5 in this embodiment works, the output end of the motor 51 rotates and drives the connected worm 552 to rotate synchronously, the worm 552 drives the turbine 551 to rotate, the turbine 551 rotates and drives the swing arm 53 to swing, and then drives the electromagnetic chuck 54 fixedly connected to the swing arm 53 to swing back and forth; the electromagnetic chuck 54 on the swing arm 53 adsorbs the magnetic suspension joint 211 on the gas-collecting hood 21, and when the swing arm 53 swings back and forth, the gas-collecting hood 21 can be driven to perform position transfer. After the gas collecting hood 21 reaches the designated position, the electromagnetic chuck 54 is controlled to be powered off through the singlechip control chip 56, and the gas collecting hood 21 falls and is placed at the designated position.
The swing arm 53 is a double-rocker mechanism, and in the swing process of the driving rod 531, due to the double-rocker swing design of the driven rod 532, the connecting rod i 533 and the connecting rod ii 534, the limit position is provided when the driven rod 532 and the connecting rod ii 534 are collinear, so that the swing arm 53 can form a limit swing angle, and the gas collecting hood 21 can accurately reach the designated position.
In addition, the support bracket 52 has a longitudinal array of mounting holes that allow the swing arm 53 to be height adjustable in a fixed mounting of the support bracket 52. The detection can be performed by changing the specific gas collecting hood 21 and adjusting the fixed mounting height of the swing arm 53 on the motor support frame 52 according to different detection objects, so that the universality is high, and the application range of the detection is widened.
Furthermore, in this embodiment, the motor 51 and the single-chip microcomputer control chip 56 are respectively connected with the computer 32, so as to realize that the product conveying system 1, the product smell collecting system 2, the data collecting and processing system 3 and the gas hood transfer system 5 are all uniformly controlled by the computer 32, so that the working coordination among the product conveying system 1, the product smell collecting system 2 and the data collecting and processing system 3 is better.
Example 5
The embodiment adopts the dynamic nondestructive testing equipment of the agricultural product quality assembly line based on the bionic olfactory technology of the embodiment 4 to carry out the dynamic nondestructive testing method of the agricultural product quality assembly line. Specifically, in this embodiment, when the dynamic nondestructive testing of the agricultural product quality assembly line is set, the odor sampling period of one agricultural product sample is 20s; the detection step comprises the following steps: placing a sample, covering a gas collecting cover, and collecting gas for 5s; the electronic nose is sampled for 5s, the gas collecting hood is lifted, and the gas collecting hood and the gas sensor in the electronic nose are cleaned (zeroed) for 10s. Furthermore, in the embodiment, the left and right swing angles of the double rocker mechanism in the gas collecting hood transfer system can reach 45 degrees.
Specifically, the detection steps are as follows:
(1) At the moment of 0s, the swing angle of the double-rocker mechanism is 45 degrees, and the electromagnetic chuck is powered off for 10s; at this time, the agricultural products are placed on the matched tray and covered with the gas collecting hood;
(2) 0-5 s, wherein the gas collecting hood is in a gas collecting state; at the moment, the agricultural products advance along with the conveyor belt at a constant speed, and the swinging arm is vertical to the conveyor belt at the moment of 5 s;
(3) 5-10 s of the working state of the electronic nose, and extracting gas in the gas collecting hood; under the control of a computer, an automatic sample injection pump of a sampling operator in the electronic nose works and sucks gas in a gas collecting cover to enable the gas to flow through a gas sensor array annular detection cavity of the electronic nose, and the gas sensor array generates response after sweeping the sensitive film surface of each gas sensor of the electronic nose for 5 seconds; starting, recording response data by the computer, and analyzing and processing;
(5) At the moment of 10s, the swing angle of the double-rocker mechanism reaches 45 degrees to the left, and the electromagnetic chuck is electrified for 10s; the electromagnetic chuck is electrified to generate magnetic force and suck the gas collecting hood;
(6) The gas collecting hood transfer system adsorbs the return stroke of the gas collecting hood for 10-20 s, and the electronic nose continuously sucks the filtered clean air to start to clean the annular detection cavity in the process, and the time is 10s;
(7) And at the moment of 20s, the starting point is reached, and the agricultural product detection is started.
The whole process is shared for 20s, wherein the voltage response data of the gas sensor array of the electronic nose is 5 seconds in total time; and the data at other times of the gas sampling period are not recorded; during a data recording time of 5 seconds, the gas sensor voltage response curve average differential value (average value of differential values between data points) is extracted as a characteristic component, and an array of 10 gas sensors thus generates a 10-dimensional voltage response vector; and in 10 seconds after the data recording is finished, the sensor cleaning time is 10 seconds, and the computer predicts the quality index score of the agricultural product according to the response vector, so that the pipeline dynamic nondestructive testing of the quality of the agricultural product is realized, the manpower, material resources and financial resources are effectively saved, and the working efficiency of the quality detection of the agricultural product is greatly improved.
In addition, in order to meet the pipeline detection requirement, in an alternative embodiment, the return sampling time of the gas collecting hood is set to be 5-8 s, and the cleaning (zero setting) time of the gas sensor of the electronic nose can be correspondingly reduced to be 5-8 s.
The above embodiments are merely preferred embodiments of the present invention and only the technical solutions of the present invention will be described in further detail, but the scope and embodiments of the present invention are not limited thereto, and any changes, combinations, deletions, substitutions or modifications made without departing from the spirit and principles of the present invention are included in the scope of the present invention.
Claims (8)
1. The bionic olfactory detection equipment is characterized by comprising a product conveying system (1), a product odor collecting system (2) and a data collecting and processing system (3);
The product conveying system (1) is used for conveying products in a production line; the product odor collecting system (2) is used for collecting odor volatile gas of the streamline dynamic products conveyed on the product conveying system (1); the product smell collecting system (2) is connected with the data collecting and processing system (3) through a gas channel (4);
The data acquisition and processing system (3) comprises an electronic nose (31) and a computer (32); the electronic nose (31) is communicated with the gas channel (4) and can perform bionic olfactory sensing response on the odor volatile gas collected by the product odor collecting system (2); the computer (32) is connected with the electronic nose (31) and can analyze and process the response signals of the electronic nose (31);
The computer (32) is also connected with the product conveying system (1) and can control the opening and the conveying speed of the product conveying system (1);
The product odor collection system (2) comprises a gas collection hood (21); an air inlet communicated with the atmosphere is formed in the top of the gas collecting hood (21) and close to the edge; an air outlet is formed in the top of the air collecting hood (21) at one side away from the air inlet; the air outlet is communicated with one end of the air channel (4), and the other end of the air channel (4) is communicated with the electronic nose (31);
a magnetic hanging joint (211) is arranged in the middle of the top of the gas collecting hood (21); the outside of the product conveying system (1) is also provided with a gas collecting hood transfer system (5);
The gas collecting hood transfer system (5) comprises a motor (51), a support frame (52), a swing arm (53) and an electromagnetic chuck (54); one end of the swing arm (53) is rotatably arranged on the support frame (52) in a shaft-rotating way, and the motor (51) is in transmission connection with one end of the swing arm (53) which can rotate in the shaft-rotating way and can drive the swing arm (53) to swing in the shaft-rotating way; the electromagnetic chuck (54) is arranged at the other end of the swing arm (53) and is positioned above the production line of the product conveying system (1) and can be used for magnetically adsorbing the magnetic hanging joint (211);
after the electromagnetic chuck (54) magnetically adsorbs the magnetic hanging joint (211), the motor (51) drives the swing arm (53) to swing around the shaft, so that the gas collecting hood (21) can be shifted on the production line of the product conveying system (1);
the support (52) has a longitudinal array of mounting holes, and the swing arm (53) is height-adjustable in the fixed mounting of the support (52).
2. The agricultural product quality assembly line dynamic nondestructive bionic olfactory detection device according to claim 1, wherein the product conveying system (1) comprises a conveying belt (11), a conveying motor (12) and a conveying support frame (13); the conveying belt (11) is arranged on the conveying support frame (13) through a belt pulley and is driven by the conveying motor (12) to carry out conveying operation; the conveying motor (12) is connected with the computer (32).
3. The agricultural product quality assembly line dynamic nondestructive bionic olfactory detection device according to claim 1, wherein an air filter (22) is installed at the inlet end of the air inlet in a connecting manner and is used for filtering air.
4. The bionic olfactory detection device with dynamic and nondestructive agricultural product quality production line according to claim 1, wherein an outlet end of the air outlet is provided with a sample injector (23), and the sample injector (23) is in sealing connection with the air channel (4);
The sample injector (23) comprises an air inlet needle head and a high molecular filter sieve; the sample injector (23) is arranged at the outlet end of the air outlet through a rubber plug (24); the rubber plug (24) is inlaid at the outlet end of the air outlet, an air inlet needle head of the sample injector (23) penetrates through the rubber plug (24) to be communicated to the inner side of the inlet end of the air outlet, and the high polymer filter sieve is positioned outside the rubber plug (24) and is in sealing connection with the air channel (4).
5. The agricultural product quality assembly line dynamic nondestructive bionic olfactory detection device according to claim 1, wherein the product conveying system (1) is provided with a matching tray (25) for containing products and capable of being matched with the bottom of the gas collecting hood (21) in a sealing way.
6. The agricultural product quality pipeline dynamic nondestructive bionic olfactory detection device of claim 1, wherein the swing arm (53) is a double-rocker mechanism; one end of a driving rod (531) of the double-rocker mechanism can be arranged on the supporting frame (52) in a rotating mode around a shaft, the motor (51) is in transmission connection with one end of the driving rod (531) in a rotating mode around the shaft, and the electromagnetic chuck (54) is arranged at the other end of the driving rod (531).
7. The agricultural product quality assembly line dynamic nondestructive bionic olfactory detection device according to claim 1, wherein the power supply of the electromagnetic chuck (54) is controlled to be switched on and off by a singlechip control chip (56); the motor (51) and the singlechip control chip (56) are respectively connected with the computer (32).
8. A dynamic nondestructive bionic olfactory detection method for an agricultural product quality assembly line, which is characterized by adopting the equipment of any one of claims 1-7 for detection, and comprising the following steps:
(1) Carrying out pipeline conveying on agricultural products;
(2) Collecting odor volatile gas of agricultural products dynamically conveyed on a pipeline, sucking the odor volatile gas by an electronic nose, and performing sensing response;
(3) After the computer collects the response signals of the electronic nose, the response signals are processed and analyzed, and the result is output;
(4) Cleaning an electronic nose;
(5) And (5) repeating the steps (2) - (4), and finishing quality detection on the agricultural products dynamically conveyed on the assembly line one by one.
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