CN111328840A - Air heat source pump dynamic baking system - Google Patents
Air heat source pump dynamic baking system Download PDFInfo
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- CN111328840A CN111328840A CN201811103388.2A CN201811103388A CN111328840A CN 111328840 A CN111328840 A CN 111328840A CN 201811103388 A CN201811103388 A CN 201811103388A CN 111328840 A CN111328840 A CN 111328840A
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- A—HUMAN NECESSITIES
- A21—BAKING; EDIBLE DOUGHS
- A21B—BAKERS' OVENS; MACHINES OR EQUIPMENT FOR BAKING
- A21B1/00—Bakers' ovens
- A21B1/40—Bakers' ovens characterised by the means for regulating the temperature
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- A—HUMAN NECESSITIES
- A21—BAKING; EDIBLE DOUGHS
- A21B—BAKERS' OVENS; MACHINES OR EQUIPMENT FOR BAKING
- A21B3/00—Parts or accessories of ovens
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- A—HUMAN NECESSITIES
- A21—BAKING; EDIBLE DOUGHS
- A21B—BAKERS' OVENS; MACHINES OR EQUIPMENT FOR BAKING
- A21B3/00—Parts or accessories of ovens
- A21B3/04—Air-treatment devices for ovens, e.g. regulating humidity
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Abstract
The invention provides an automatic baking monitoring system and a method, which are used for monitoring the baking process of food in an oven, and the system mainly comprises a central control computer and an acquisition control subsystem in data communication connection with the central control computer; the acquisition control subsystem comprises a baking heater, a ventilation regulating device, a temperature and humidity sensor, a PID controller and an electronic nose; the automatic baking monitoring system and the monitoring method can automatically acquire the actual temperature, the actual humidity and the actual gas composition in the baking process of the food in the oven in real time through cyclic judgment and control, accurately judge the baking stage of the food in real time according to the actual gas composition in the oven, and correspondingly adjust the temperature and the humidity in the oven to reach the baking temperature set value and the baking humidity set value corresponding to the baking stage of the food, thereby realizing the self-adaptive adjustment and monitoring of the baking process of the food and further improving the accuracy and the baking quality of the baking process.
Description
Technical Field
The invention relates to the technical field of drying automation, in particular to a dynamic baking system of an air heat source pump.
Background
In most countries of the world, baked products, whether staple food or non-staple food, are very important. Baked products, also known as baked products, include both baked cereal products, often referred to as bread, cookies and other types of pastry, and baked bacon, baked tea and other types of food products.
Since the Chinese reform was open, the bakery industry has developed faster, and with the further development of Chinese economy, the consumer's demand for bakery also increasingly presents high-grade, quality requirements, which put forward higher requirements for enterprises in bakery industry. However, at present, the baking industry in China still has many problems, and how to adopt corresponding measures to promote the development of the industry is particularly important for the current form.
Now there is a considerable gap between baked products in our country compared to other countries in the world. A great deal of work is needed to be done in the aspects of baking processing technology, baked product quality, production scale and product types.
Baking is an important link in determining the final quality and usability of baked products, and the quality factors such as color, luster, oil content and the like, as well as the internal chemical composition and aroma and taste indexes of the finished baked products can be expressed only after baking and modulation. The conventional manual baking needs to be monitored by workers on site, most of the conventional manual baking depends on manual experience and manual operation in the baking process, the required labor intensity is high, the born risk is high, the baking technology is difficult to master, the phenomena of baking error, baking paste and the like generally exist, and the baking loss is serious.
In recent years, the automatic or semi-automatic development of the baking industry in China is still in the initial stage, and in the production of automatic or semi-automatic baking equipment, the most urgent problems to be solved are to implement the baking process more correctly, reduce the labor for baking, reduce the labor intensity and improve the baking benefit.
The current automatic or semi-automatic ovens generally only have several time-based baking modes designed, each provided with a fixed baking time, the temperature and humidity of the baking being controlled as a function of the time schedule. However, the baking control method is difficult to flexibly adapt to different baking application environments, the control on the baking temperature and the baking humidity cannot be adjusted in a self-adaptive manner according to the actual baking progress of food, and the accuracy and the baking quality of the baking process are difficult to guarantee.
Aiming at the problems in the prior art and solving the problems that the self-adaptive adjustment performance of the baking control technology in the prior art is limited and the accuracy of the baking process and the baking quality are difficult to guarantee, the invention provides the dynamic baking system and the dynamic baking method of the air heat source pump, so that the self-adaptive adjustment performance of the food baking process is improved, and the accuracy of the baking process and the baking quality are better guaranteed.
Disclosure of Invention
Therefore, the invention provides an air heat source pump dynamic baking system which is used for overcoming the problem of low baking quality in the prior art.
In one aspect, the present invention provides a dynamic air heat source pump baking system, which monitors materials in a baking oven and uses different baking processes according to different detected states, comprising:
the PID controller is in data communication connection with the central control computer and is used for receiving the baking temperature set value sent by the central control computer;
the baking heater is electrically connected with the PID controller and is used for baking and heating food in the oven according to the control operation of the PID controller;
the ventilation regulating device is electrically connected with the PID controller and is used for regulating the opening and closing of the oven ventilation channel and the ventilation quantity according to the control operation of the PID controller;
and the temperature and humidity sensor is arranged in the oven, is in data connection with the PID controller, and is used for acquiring the actual temperature and the actual humidity in the oven and transmitting the actual temperature and the actual humidity to the PID controller.
Furthermore, the electronic nose is in data communication connection with the central control computer and is used for collecting actual gas components in the oven and transmitting the actual gas components to the central control computer.
Further, the central control computer stores a food baking monitoring information table of the baked food; the central control computer is used for acquiring actual gas components in the oven collected by the electronic nose, comparing the actual gas components in the oven with characteristic gas components correspondingly emitted by the baked food in each baking stage recorded in the food baking monitoring information table of the baked food, determining a baking temperature set value and a baking humidity set value corresponding to the baking stage where the baked food is located by inquiring the food baking monitoring information table of the baked food, and sending the baking temperature set value and the baking humidity set value corresponding to the baking stage where the baked food is located to the PID controller.
Further, the acquisition control subsystem further comprises a pan-tilt camera;
the pan-tilt camera is arranged in the oven, is in data communication connection with the central control computer, and is used for acquiring video images in the oven according to the control operation of the central control computer and transmitting the video images to the central control computer;
and the central control computer is also used for controlling the pan-tilt camera, acquiring a video image in the oven collected by the pan-tilt camera and displaying the video image.
Furthermore, the number of the acquisition control subsystems is multiple, each acquisition control subsystem is respectively in data communication connection with the central control computer, and each acquisition control subsystem is used for corresponding to one oven, so that the food baking process in the ovens is monitored.
In another aspect, the present invention provides a baking process for an air heat source pump dynamic baking system, comprising:
step 1: the method comprises the steps that a food baking monitoring information table of baked food is stored and set in a central control computer in advance, and characteristic gas components emitted by the baked food in each baking stage and baking temperature set values and baking humidity set values corresponding to the baking stages of the baked food are recorded in the food baking monitoring information table;
step 2: putting the baked food into an oven, and starting a food baking process;
and step 3: the electronic nose collects the actual gas composition in the oven in real time and transmits the actual gas composition to the central control computer; the temperature and humidity sensor collects the actual temperature and the actual humidity in the oven in real time and transmits the actual temperature and the actual humidity to the PID controller;
and 4, step 4: the central control computer acquires actual gas components in the oven collected by the electronic nose, compares the actual gas components in the oven with characteristic gas components correspondingly emitted by the baked food in each baking stage and recorded in a food baking monitoring information table of the baked food, determines the baking stage of the baked food according to the characteristic gas components contained in the actual gas components in the oven, further determines a baking temperature set value and a baking humidity set value corresponding to the baking stage of the baked food by inquiring the food baking monitoring information table of the baked food, and sends the baking temperature set value and the baking humidity set value corresponding to the baking stage of the baked food to the PID controller;
and 5: the PID controller receives a baking temperature set value and a baking humidity set value sent by the central control computer, acquires actual temperature and actual humidity in the oven collected by the temperature and humidity sensor, controls the baking heater and the ventilation regulating device according to the actual temperature and the actual humidity in the oven, enables the baking heater to bake and heat food in the oven according to the control operation of the PID controller, and enables the ventilation regulating device to regulate the opening and closing of a ventilation channel of the oven and the size of ventilation volume according to the control operation of the PID controller, so that the temperature and the humidity in the oven respectively reach the baking temperature set value and the baking humidity set value;
and 6) circularly executing the steps 4-5 until the food baking process is finished.
Compared with the prior art, the invention has the beneficial effects that:
1. the dynamic baking system of the air heat source pump can automatically acquire the actual temperature, the actual humidity and the actual gas composition in the baking process of food in the oven in real time in an unattended or unattended environment, accurately judge the baking stage of the food in real time according to the actual gas composition in the oven, and correspondingly adjust the temperature and the humidity in the oven to reach the baking temperature set value and the baking humidity set value corresponding to the baking stage of the food, thereby realizing the self-adaptive adjustment and monitoring of the baking process of the food and further improving the accuracy and the baking quality of the baking process.
Furthermore, the air heat source pump dynamic baking system can be combined with a video camera technology to observe and record the color and character changes of food in the baking process of the baking oven, so that technicians can better control the whole process of the food baking process, and the baking quality is further improved.
Furthermore, the air heat source pump dynamic baking system realizes the combined monitoring of the food baking processes in a plurality of baking ovens through a computer data communication technology, further reduces the labor intensity of baking process control, and is also beneficial to reducing the scale construction cost of the system.
Furthermore, the air heat source pump dynamic baking system is easy to master for operators, the operators do not need to know a large amount of complete baking technology, high-quality food baking process monitoring can be realized only by simple labor, the development of specialized baking is effectively promoted, the baking quality and benefit of products are improved, and the labor efficiency of baking operation is greatly improved.
Drawings
FIG. 1 is a block diagram of the architecture of one embodiment of the air heat source pump dynamic toasting system of the present invention;
FIG. 2 is a block flow diagram of the air heat source pump dynamic toasting system of the present invention;
FIG. 3 is a block diagram of a modified embodiment of the air heat source pump dynamic toasting system according to the present invention;
FIG. 4 is a block diagram of another embodiment of the present invention.
Detailed Description
In order that the objects and advantages of the invention will be more clearly understood, the invention is further described below with reference to examples; it should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The above and further features and advantages of the present invention are described in more detail below with reference to the accompanying drawings.
The invention provides an air heat source pump dynamic baking system which is used for monitoring the baking process of food in a baking oven and solving the problems that the self-adaptive adjustment performance of a baking control technology in the prior art is limited, and the accuracy of a baking process and the baking quality are difficult to guarantee. As shown in FIG. 1, the air heat source pump dynamic baking system of the present invention is mainly composed of a central control computer and an acquisition control subsystem in data communication connection with the central control computer; the set of acquisition control subsystem mainly comprises a baking heater, a ventilation regulating device, a temperature and humidity sensor, a PID controller, an electronic nose and other devices.
The baking heater is arranged in the oven and electrically connected with the PID controller and used for baking and heating food in the oven according to the control operation of the PID controller. The baking heater can be a commercially available mature product, and the specifications of the specifically selected baking heater product are determined according to the specific object of the food to be baked.
The ventilation regulating device is electrically connected with the PID controller and is used for regulating the opening and closing of the oven ventilation channel and the size of ventilation volume according to the control operation of the PID controller. In a specific application, as an implementation scheme, the ventilation regulating device mainly comprises an air inlet machine arranged at an air inlet of the oven and an electric control air door arranged at an air outlet channel of the oven, wherein the air inlet machine and the electric control air door are respectively and electrically connected with a PID controller, and the air inlet quantity and the air outlet channel are respectively regulated to be opened and closed according to the control operation of the PID controller, so that the functions of opening and closing the ventilation channel of the oven and regulating the ventilation quantity are realized; as another embodiment, the ventilation regulating device may be mainly composed of an electric control air door disposed in the air inlet channel of the oven and an exhaust fan disposed at the air outlet of the oven, the electric control air door and the exhaust fan are respectively electrically connected to the PID controller, and the opening and closing of the air inlet channel and the size of the air exhaust volume are respectively regulated according to the control operation of the PID controller, thereby realizing the regulating functions of the opening and closing of the ventilation channel of the oven and the size of the ventilation volume.
The temperature and humidity sensor is arranged in the oven, is in data connection with the PID controller, and is used for acquiring the actual temperature and the actual humidity in the oven and transmitting the actual temperature and the actual humidity to the PID controller. The temperature and humidity sensor is an existing mature product and can be obtained commercially, for example, a siemens analog quantity expansion module EM231CN can be adopted, wherein the temperature and humidity sensor is a wet-dry ball PT100 sensor, so that the actual temperature and the actual humidity in the oven can be acquired; the temperature measurement precision of the dry-wet ball PT100 sensor is about +/-0.5% F.S +/-1D, the humidity measurement precision is about +/-2% F.S +/-1D, the temperature measurement range is 0-120 ℃, the humidity measurement range is 5-100% RH, the working power supply is alternating current 220V +/-10% and 50Hz, the power consumption per hour is less than 5W, and the dry-wet ball PT100 sensor has eight sections of temperature and humidity programming functions and an RS485 communication function and is excellent in performance.
The PID controller is respectively electrically connected with the baking heater and the ventilation regulating equipment, is in data communication connection with the temperature and humidity sensor, and is also in data communication connection with the central control computer, and is used for receiving a baking temperature set value and a baking humidity set value sent by the central control computer, acquiring the actual temperature and the actual humidity in the oven collected by the temperature and humidity sensor, and controlling the baking heater and the ventilation regulating equipment according to the actual temperature and the actual humidity in the oven so as to enable the temperature and the humidity in the oven to respectively reach the baking temperature set value and the baking humidity set value. The core of the PID controller is a PID control algorithm (proportional-integral-derivative control algorithm), the PID control algorithm is used for realizing a negative feedback closed-loop control function, disturbance caused by various factors in a system closed loop can be restrained, feedback can be changed along with a set value, namely the PID controller calculates the control output quantity of the PID controller according to the PID control algorithm according to the difference value between the set value (such as a baking temperature set value and a baking humidity set value in the scheme) and the actual value of a controlled object (such as the actual temperature and the actual humidity in an oven formed by the baking heater and ventilation regulating equipment in the scheme), and then the controlled object (such as the baking heater and the ventilation regulating equipment in the scheme) is controlled and operated, so that the actual value of the controlled object reaches the set value. The PID controller is also a mature product in the prior art, for example, Siemens S7-200 series CPU 224 XPCN AC/DC/Relay programmable PID controller can be selected, Siemens S7-200 series PID controller can control the baking heater and the ventilation regulating equipment by setting parameters of sampling time, gain, integral time, differential time and the like of PID control algorithm, and simultaneously provides RS485 communication function, the S7-200 series PID controller can be connected with the central control computer in data communication, and then relevant parameters of the S7-200 series PID controller are set and monitored through a software interface running on the central control computer.
The electronic nose is in data communication connection with the central control computer and is used for collecting actual gas components in the oven and transmitting the actual gas components to the central control computer. The electronic nose is an electronic device or system for recognizing odor by using a response spectrum of a gas sensor array, and mainly comprises the gas sensor array, a signal preprocessing unit and a mode recognition unit. The working principle of the electronic nose is as follows: when a certain smell appears in front of a gas sensor made of an active material, the gas sensor can convert chemical input of the gas into electric signal output, a plurality of gas sensors are adopted to form a gas sensor array, and the response of the plurality of gas sensors to the smell forms an electric signal output array of the gas sensor array to the smell; in order to realize qualitative or quantitative analysis of the odor, the electrical signal output of the gas sensor needs to be subjected to appropriate preprocessing (noise elimination, feature extraction, signal amplification, normalization and the like), and then is subjected to identification processing by a pattern identification unit by adopting an appropriate pattern identification analysis method; theoretically, each smell has a characteristic electric signal array value corresponding to the gas sensor array, the characteristic electric signal array values corresponding to different smells are stored in the pattern recognition unit as gas neurons of the electronic nose, the electric signal output array values of the gas sensor array are compared with the gas neurons for matching recognition during gas detection, different gas components in the environment can be distinguished and recognized, and cross sensitivity of various gases can be measured and recognized by the gas sensor array. The electronic nose also belongs to the prior art, namely, a commercially available mature product can be realized through independent research and development, and the selection of a gas sensor array and the setting of a gas neuron in a mode identification unit in specific application are determined according to a baked food object aimed at by the air heat source pump dynamic baking system and characteristic gas components emitted by the baked food object at each stage in the baking process; as to how to specifically study the composition of the gas components emitted by the food in different stages of the baking process, and which gas component or gas components emitted by the food in different stages of the baking process are selected as the characteristic gas components for distinguishing and identifying the food in the corresponding baking stages, the invention is not the key content of the invention, the invention only needs to use the existing research results of the characteristic gas component conditions emitted by the food to be baked in different stages of the baking process, a plurality of gas sensors respectively having good sensitive response characteristics to the various characteristic gas components emitted by the food to be baked in each baking stage are selected to form a gas sensor array according to the research results, and the mode identification unit is set with the gas neurons corresponding to the various characteristic gas components emitted by the food to be baked in each stage of the baking process, so as to ensure that various characteristic gas components emitted by the baked food in various stages in the baking process can be collected and identified by the electronic nose. It should be noted that, in the present invention, the characteristic gas components emitted by the baked food in each baking stage specifically refer to: among the gas components emitted by the baked food in any baking stage, the gas components can be used for distinguishing one or more gas components which judge that the baked food is in the baking stage, and the gas components are used as characteristic gas components emitted by the baked food in the baking stage; thereby obtaining the characteristic gas components which are correspondingly emitted by the baked food in each baking stage.
The central control computer stores a food baking monitoring information table of the baked food, and the food baking monitoring information table records characteristic gas components correspondingly emitted by the baked food in each baking stage and baking temperature set values and baking humidity set values corresponding to the baked food in each baking stage; the central control computer is used for acquiring actual gas components in the oven collected by the electronic nose, comparing the actual gas components in the oven with characteristic gas components correspondingly emitted by the baked food in each baking stage and recorded in a food baking monitoring information table of the baked food, determining the baking stage of the baked food according to the characteristic gas components contained in the actual gas components in the oven, further determining a baking temperature set value and a baking humidity set value corresponding to the baking stage of the baked food by inquiring the food baking monitoring information table of the baked food, and sending the baking temperature set value and the baking humidity set value corresponding to the baking stage of the baked food to the PID controller. The central control computer can be realized by adopting a personal computer in the prior art, generally comprises the components of the personal computer such as a host, a data acquisition card, a display and the like, and is mainly used for realizing the remote central integrated monitoring operation function and realizing man-machine conversation; certainly, corresponding baking monitoring software needs to be designed in the central control computer to achieve the functions, the baking monitoring software can be designed and developed on common computer operating system platforms such as a windows XP operating system, a windows7 operating system, a windows server 2003 operating system and the like by using software design tools such as delphi and the like, and the designed baking monitoring software correspondingly runs on common computer operating system platforms such as a windows XP operating system, a windows7 operating system, a windows server 2003 operating system and the like to achieve a man-machine conversation function and is used for performing the baking monitoring operation. In the scheme of the invention, if the equipment in the acquisition control subsystem, which is in data communication connection with the central control computer, adopts RS485 communication interfaces, the central control computer also adopts a data acquisition card of the RS485 communication interface; in this case, if the devices in the acquisition control subsystem, which are in data communication connection with the central control computer, all adopt RS485 communication interfaces, the data communication connection between the acquisition control subsystem and the central control computer can be realized through an RS485 to RS232 interface converter.
The air heat source pump dynamic toasting system of the present invention has substantial technical differences from the time based control of the toasting mode of the prior art. In the prior art, in the time-based baking mode control, each baking mode is provided with fixed baking time, and the baking temperature and humidity are controlled along with the time schedule, so that the baking control mode is difficult to flexibly adapt to different baking application environments, and the baking temperature and humidity can not be controlled in a self-adaptive manner according to the actual baking schedule of food; for example, for some foods that have been baked to an intermediate stage but are difficult to distinguish visually, the foods are not visually distinguished from the foods in a full-time state, and if the foods are baked in a time-based baking mode all the time, the foods are excessively baked, which affects the accuracy of the baking process and the baking quality. The air heat source pump dynamic baking system of the present invention employs a monitoring method that is significantly different from the prior art. Because the main component of the food is carbohydrate, the carbohydrate is heated and changed in the baking process and is accompanied with the evaporation of the moisture, the evaporated moisture can carry the specific carbohydrate components in the food, and the carbohydrate carried in the evaporated moisture in different stages in the baking process of the food also changes along with the heating change condition of the food, so the composition conditions of the gas components emitted by the food in different stages in the baking process are different, therefore, one or more gas components can be found out from the gas components emitted by any one baking stage of the food to distinguish and judge that the food is in the baking stage but not in other baking stages, and the one or more gas components can be used as characteristic gas components for distinguishing and judging that the food is in the baking stage; the air heat source pump dynamic baking system of the invention just utilizes the characteristic of food, adopts an air heat source pump dynamic baking system based on gas component collection and judgment, and the processing flow of the monitoring method is shown in figure 2, and concretely comprises the following steps:
1) the method comprises the steps that a food baking monitoring information table of baked food is stored and set in a central control computer in advance, and characteristic gas components emitted by the baked food in each baking stage and baking temperature set values and baking humidity set values corresponding to the baking stages of the baked food are recorded in the food baking monitoring information table;
2) putting the baked food into an oven, and starting a food baking process;
as can be seen from the above baking process, the air heat source pump dynamic baking system of the invention can judge the baking stage of the baked food in real time according to the characteristic gas components emitted by the food in the oven through cyclic judgment and control, and further control the temperature and the humidity in the oven to respectively reach the baking temperature set value and the baking humidity set value corresponding to the baking stage of the baked food in real time, so that the air heat source pump dynamic baking system can adaptively adjust the control of the baking temperature and the humidity according to the specific baking stage of the food to accurately reach the baking temperature set value and the baking humidity set value required by the baking process, therefore, the air heat source pump dynamic baking system can accurately control the baking process of the food according to the baking process requirements recorded in the food baking monitoring information table no matter which baking stage the baked food is in, even if the food starts the baking process from the middle stage of the baking, the accidental monitoring operation of the food baking excess can not occur. Therefore, the dynamic baking system and the monitoring method of the air heat source pump improve the self-adaptive adjustment performance of the food baking process, and can better ensure the accuracy and the baking quality of the baking process. For specific implementation, the central control computer can pre-store food baking monitoring information tables of various foods, and when baking monitoring is carried out, one of corresponding types is set as the food baking monitoring information table of the baked food according to the specific types of the baked food; of course, if the monitored oven is dedicated to baking one food, the central control computer only needs to store and set a food baking monitoring information table corresponding to the baked food.
As the improved scheme of the air heat source pump dynamic baking system, on the basis of the system framework, the system can also be additionally provided with a video monitoring function, namely, a pan-tilt camera is additionally arranged in the acquisition control subsystem, is arranged in the baking oven and is in data communication connection with a central control computer, and is used for acquiring video images in the baking oven according to the control operation of the central control computer and transmitting the video images to the central control computer; the central control computer is used for controlling the pan-tilt camera, acquiring video images in the oven collected by the pan-tilt camera and displaying the video images except for realizing the monitoring function; the system architecture diagram of the air heat source pump dynamic roasting system of the improved scheme is shown in figure 3. When the vacuum heat insulation protection cover is used in a specific application, the tripod head camera is arranged in the oven, the temperature of the working environment is higher, so that the vacuum heat insulation protection cover is preferably additionally arranged on the tripod head camera to ensure the normal work of the tripod head camera in a high-temperature environment, and the tripod head camera and the vacuum heat insulation protection cover are mature products in the prior art and can be obtained by market purchase. The pan-tilt camera mainly comprises a pan-tilt and a camera erected on the pan-tilt; the pan-tilt usually needs to be in data communication connection with a data acquisition card of a central control computer through a coding controller, the central control computer sends a control instruction to the coding controller, and the coding controller decodes the control instruction and then controls the pan-tilt to perform corresponding camera shooting visual angle adjustment operation; meanwhile, a video acquisition card needs to be additionally arranged in the central control computer, the camera can be directly in data communication connection with the video acquisition card of the central control computer, the acquired video image in the oven is transmitted to the central control computer, the central control computer acquires the acquired video image in the oven and then displays the video image, the video image is displayed through a display of the central control computer, and the video image can be stored and recorded. According to the improved scheme, by combining the video camera technology, an operator can observe and record the color and form change of food in the baking process through operating the central control computer, so that the technical personnel can better control the whole process of the food baking process, and the baking quality is further improved.
As an improvement of the other aspect of the air heat source pump dynamic baking system of the invention, a plurality of acquisition control subsystems are provided in the system, each acquisition control subsystem is respectively connected with the central control computer in a data communication manner in the manner described above, and each acquisition control subsystem is used for corresponding to one oven, thereby realizing the monitoring of the baking process of food in a plurality of ovens; the system architecture diagram of the air heat source pump dynamic roasting system of the improved scheme is shown in figure 4. Therefore, the air heat source pump dynamic baking system can be integrated and applied in a large scale, and an operator can realize the combined monitoring of the baking processes of food in a plurality of baking ovens through one central control computer, so that the labor intensity of the baking process control is further reduced, and the large-scale construction cost of the system is also reduced. So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention; various modifications and alterations to this invention will become apparent to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. An air heat source pump dynamic baking system, by monitoring the material in the oven and using different baking processes according to different detected conditions, comprising:
the PID controller is in data communication connection with the central control computer and is used for receiving the baking temperature set value sent by the central control computer;
the baking heater is electrically connected with the PID controller and is used for baking and heating food in the oven according to the control operation of the PID controller;
the ventilation regulating device is electrically connected with the PID controller and is used for regulating the opening and closing of the oven ventilation channel and the ventilation quantity according to the control operation of the PID controller;
and the temperature and humidity sensor is arranged in the oven, is in data connection with the PID controller, and is used for acquiring the actual temperature and the actual humidity in the oven and transmitting the actual temperature and the actual humidity to the PID controller.
2. An air heat source pump dynamic toasting system as claimed in claim 1 wherein said electronic nose is in data communication with a central control computer for collecting and transmitting the actual gas composition within the toaster to the central control computer.
3. The air heat source pump dynamic toasting system of claim 1, wherein said central control computer stores a food toasting monitoring information table of the toasted food; the central control computer is used for acquiring actual gas components in the oven collected by the electronic nose, comparing the actual gas components in the oven with characteristic gas components correspondingly emitted by the baked food in each baking stage recorded in the food baking monitoring information table of the baked food, determining a baking temperature set value and a baking humidity set value corresponding to the baking stage where the baked food is located by inquiring the food baking monitoring information table of the baked food, and sending the baking temperature set value and the baking humidity set value corresponding to the baking stage where the baked food is located to the PID controller.
4. The air heat source pump dynamic toasting system of claim 1 wherein the acquisition control subsystem further comprises a pan-tilt camera;
the pan-tilt camera is arranged in the oven, is in data communication connection with the central control computer, and is used for acquiring video images in the oven according to the control operation of the central control computer and transmitting the video images to the central control computer;
and the central control computer is also used for controlling the pan-tilt camera, acquiring a video image in the oven collected by the pan-tilt camera and displaying the video image.
5. The air heat source pump dynamic baking system of claim 1, wherein there are a plurality of collection control subsystems, each collection control subsystem is connected with the central control computer in data communication, and each collection control subsystem is used for corresponding to one oven, so as to monitor the baking process of food in a plurality of ovens.
6. The bake process of the air heat source pump dynamic baking system of any of claims 1-5, comprising:
step 1: the method comprises the steps that a food baking monitoring information table of baked food is stored and set in a central control computer in advance, and characteristic gas components emitted by the baked food in each baking stage and baking temperature set values and baking humidity set values corresponding to the baking stages of the baked food are recorded in the food baking monitoring information table;
step 2: putting the baked food into an oven, and starting a food baking process;
and step 3: the electronic nose collects the actual gas composition in the oven in real time and transmits the actual gas composition to the central control computer; the temperature and humidity sensor collects the actual temperature and the actual humidity in the oven in real time and transmits the actual temperature and the actual humidity to the PID controller;
and 4, step 4: the central control computer acquires actual gas components in the oven collected by the electronic nose, compares the actual gas components in the oven with characteristic gas components correspondingly emitted by the baked food in each baking stage and recorded in a food baking monitoring information table of the baked food, determines the baking stage of the baked food according to the characteristic gas components contained in the actual gas components in the oven, further determines a baking temperature set value and a baking humidity set value corresponding to the baking stage of the baked food by inquiring the food baking monitoring information table of the baked food, and sends the baking temperature set value and the baking humidity set value corresponding to the baking stage of the baked food to the PID controller;
and 5: the PID controller receives a baking temperature set value and a baking humidity set value sent by the central control computer, acquires actual temperature and actual humidity in the oven collected by the temperature and humidity sensor, controls the baking heater and the ventilation regulating device according to the actual temperature and the actual humidity in the oven, enables the baking heater to bake and heat food in the oven according to the control operation of the PID controller, and enables the ventilation regulating device to regulate the opening and closing of a ventilation channel of the oven and the size of ventilation volume according to the control operation of the PID controller, so that the temperature and the humidity in the oven respectively reach the baking temperature set value and the baking humidity set value;
and 6) circularly executing the steps 4-5 until the food baking process is finished.
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