CN114658316A - Method and device for controlling opening of small window of livestock house - Google Patents
Method and device for controlling opening of small window of livestock house Download PDFInfo
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- CN114658316A CN114658316A CN202011538519.7A CN202011538519A CN114658316A CN 114658316 A CN114658316 A CN 114658316A CN 202011538519 A CN202011538519 A CN 202011538519A CN 114658316 A CN114658316 A CN 114658316A
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- 238000000034 method Methods 0.000 title claims abstract description 51
- 244000144972 livestock Species 0.000 title claims abstract description 28
- 230000002441 reversible effect Effects 0.000 claims abstract description 47
- 230000009471 action Effects 0.000 claims abstract description 44
- 244000144977 poultry Species 0.000 claims description 10
- 239000000126 substance Substances 0.000 claims description 3
- 238000009423 ventilation Methods 0.000 abstract description 16
- 230000000694 effects Effects 0.000 abstract description 12
- 241000287828 Gallus gallus Species 0.000 description 12
- 235000013330 chicken meat Nutrition 0.000 description 12
- 230000008569 process Effects 0.000 description 12
- 235000013594 poultry meat Nutrition 0.000 description 8
- 238000004364 calculation method Methods 0.000 description 6
- 238000009395 breeding Methods 0.000 description 4
- 230000001488 breeding effect Effects 0.000 description 4
- 239000003638 chemical reducing agent Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 206010021143 Hypoxia Diseases 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000008645 cold stress Effects 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 244000144992 flock Species 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 230000001012 protector Effects 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 206010019345 Heat stroke Diseases 0.000 description 1
- 206010063385 Intellectualisation Diseases 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000008642 heat stress Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
- E05F15/00—Power-operated mechanisms for wings
- E05F15/70—Power-operated mechanisms for wings with automatic actuation
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- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
- E05F15/00—Power-operated mechanisms for wings
- E05F15/70—Power-operated mechanisms for wings with automatic actuation
- E05F15/71—Power-operated mechanisms for wings with automatic actuation responsive to temperature changes, rain, wind or noise
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
- E05F15/00—Power-operated mechanisms for wings
- E05F15/70—Power-operated mechanisms for wings with automatic actuation
- E05F15/79—Power-operated mechanisms for wings with automatic actuation using time control
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; CARE OF BIRDS, FISHES, INSECTS; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K1/00—Housing animals; Equipment therefor
- A01K1/0047—Air-conditioning, e.g. ventilation, of animal housings
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; CARE OF BIRDS, FISHES, INSECTS; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K31/00—Housing birds
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- Housing For Livestock And Birds (AREA)
Abstract
The invention provides a control method and a control device for the opening of a small window of a livestock house, wherein the control method comprises the following steps: acquiring full-open time and full-close time of the small window, wherein the full-open time is the time required by the small window from a closed state to a full-open state when the small window is controlled to move in a forward direction, and the full-close time is the time required by the small window from the full-open state to the closed state when the small window is controlled to move in a reverse direction; acquiring the initial opening of the small window at the starting point of a first time period and the forward action time and the reverse forward action time of the small window in the first time period; and acquiring the current opening degree of the small window according to the initial opening degree, the forward action time, the reverse action time, the full opening time and the full closing time. According to the technical scheme, the current opening degree of the small window is obtained through the initial opening degree of the small window and the historical action data of the small window, and the opening degree of the small window is controlled on the basis of the current opening degree of the small window, so that a good ventilation effect is achieved.
Description
Technical Field
The invention relates to the technical field of control, in particular to a method and a device for controlling the opening of a small window of a livestock house.
Background
At present, livestock and poultry breeding gradually develops towards mechanization, intellectualization and intensification, and large-scale farms gradually replace scattered household breeding. A closed breeding house is usually adopted in a large-scale farm, and centralized control of environmental factors such as temperature, humidity and the like is facilitated. The closed cultivation house uses a negative pressure fan to pump out air in the house, and the air inlet effect is controlled through the opening degree of equipment such as a small window, a side air window and a guide plate.
The opening of the small window and other equipment affects the air intake and the air intake direction, and further affects the air mixing and ventilation effect of the whole livestock and poultry house, so the opening control of the small window is particularly important in the control of the breeding environment. The existing culture environment controller has different control modes for small windows, good control effects and poor stability, and in the actual use process, the conditions of inappropriate opening and negative pressure can also occur, so that the phenomenon that chickens in the house die only occurs.
In some small window opening control schemes, an additional encoder and a potentiometer are required to be added to an original small window structure to detect the opening of the small window, and the structural design difficulty and the input cost are relatively high. In other small window opening control schemes, the small window automatic controller needs to be matched with a negative pressure sensor of a specific model for use, the control effect is good, but the price is high.
Therefore, a new control scheme for the opening of the small window of the livestock house needs to be developed.
It is noted that the information disclosed in the background section above is only for enhancement of understanding of the background of the present disclosure, and therefore, may include information that does not constitute prior art that is known to those of ordinary skill in the art.
Disclosure of Invention
The purpose of the disclosure is to provide a control method for the opening of a small window of a livestock house, so that the accurate positioning and control of the opening of the small window can be realized under the condition of low cost, and a good ventilation effect can be achieved.
The invention provides a method for controlling the opening degree of a small window of a livestock house, which comprises the following steps: acquiring full-open time and full-close time of the small window, wherein the full-open time is the time required by the small window from a closed state to a full-open state when the small window is controlled to move in a forward direction, and the full-close time is the time required by the small window from the full-open state to the closed state when the small window is controlled to move in a reverse direction; acquiring the initial opening degree of the small window at the starting point of a first time period and the forward action time and the reverse forward action time of the small window in the first time period; and acquiring the current opening degree of the small window according to the initial opening degree, the forward action time, the reverse action time, the full opening time and the full closing time.
In some embodiments, the obtaining the current opening degree of the small window comprises: calculating the current opening degree of the small window according to the following formula
Wherein the content of the first and second substances,
the initial opening degree is To be the forward action time, To is the full opening time, Tc is the reverse action time, and Tc is the full closing time.
In some embodiments, after obtaining the current opening degree of the small window, the control method further includes: acquiring the target opening degree of the small window; and controlling the small window to perform forward action or reverse action according to the target opening and the current opening.
In some embodiments, after obtaining the current opening degree of the small window, the control method further includes: acquiring the out-house temperature, the set temperature range and the set negative pressure range of the livestock house; determining a target negative pressure according to the out-of-house temperature, the set temperature range and the set negative pressure range; determining the target opening degree of the small window according to the target negative pressure; and controlling the small window to perform forward motion or reverse motion according to the target opening and the current opening.
In some embodiments, after obtaining the current opening degree of the small window, the control method further includes: acquiring the out-house temperature, the set temperature range and the set negative pressure range of the livestock house; determining a target negative pressure according to the out-of-house temperature, the set temperature range and the set negative pressure range; if the target negative pressure is in the set negative pressure range, setting a non-action area in the set negative pressure range according to the target negative pressure, and if the current negative pressure is in the non-action area range, controlling the small window to be not in action.
In some embodiments, the determining a target negative pressure according to the out-of-house temperature, the set temperature range, and the set negative pressure range includes: determining the target negative pressure according to the following formula
Wherein, PXFor the target negative pressure, T is the house outside temperature, P1 and P2 are the upper and lower limits, respectively, of the set negative pressure range, and T1 and T2 are the upper and lower limits, respectively, of the set temperature range.
In some embodiments, the setting of the set negative pressure range according to the target negative pressure is a non-action region, and if the current negative pressure is within the non-action region, the formula is as follows: (P)x-△P/2)≤P≤(Px+. DELTA P/2), where P is the current negative pressure, DELTA P is a first threshold value, PxThe target negative pressure is obtained.
In some embodiments, if it is determined that the time for the small window to perform the forward motion or the reverse motion is less than a second threshold according to the target opening and the current opening, controlling the duration of the small window to continuously act on the second threshold.
In some embodiments, after the small window is controlled to complete the forward motion or the reverse motion according to the target opening and the current opening, the small window is controlled to continue the forward motion or the reverse motion for a third threshold time.
The invention also provides a device for controlling the opening degree of the small window of the livestock house, which is applied to the method for controlling the opening degree of the small window of the livestock house in the technical scheme.
The invention provides a control method of the opening of a small window of a livestock shed, which is characterized in that the current opening of the small window is obtained by obtaining the initial opening, historical action data and full-open and full-close time of the small window so as to carry out opening and closing actions on the small window.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the disclosure. It is to be understood that the drawings in the following description are merely exemplary of the disclosure, and that other drawings may be derived from those drawings by one of ordinary skill in the art without the exercise of inventive faculty.
FIG. 1 is a schematic view showing a structure of a small window and a manual operation in the related art;
FIG. 2 is a schematic view showing a structure of a small window and an automatic operation in the related art;
FIG. 3 is a schematic view showing air flow in a case where a small window is excessively opened in summer in the related art;
FIG. 4 is a schematic view showing an air flow in a related art when a summer small window is excessively opened;
FIG. 5 is a schematic view illustrating air flow when the opening of a window is too large in a winter season in the related art;
FIG. 6 is a schematic view showing an air flow when a winter window is small in opening in the related art;
fig. 7 schematically shows a flow chart of a method of controlling the opening of a window of a poultry house according to the invention;
FIG. 8 schematically illustrates a flow chart of a method of small window opening calibration in an embodiment of the present invention;
fig. 9 schematically shows a flowchart of a small window opening obtaining method in the embodiment of the invention;
FIG. 10 is a schematic diagram showing the relationship between the negative pressure inside the house and the temperature outside the house according to an embodiment of the present invention;
FIG. 11 is a schematic view showing the relationship between the opening degree of the small window and the negative pressure in the differential pressure mode in the embodiment of the invention;
FIG. 12 is a flowchart schematically showing another method of controlling the opening of the window of the poultry house according to the present invention;
fig. 13 is a schematic view showing the configuration of a small window opening control system in the embodiment of the invention;
fig. 14 schematically shows an air flow diagram of the small window opening control in the embodiment of the present invention.
Detailed Description
Example embodiments are now described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art.
Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to provide a thorough understanding of embodiments of the invention. One skilled in the relevant art will recognize, however, that the invention may be practiced without one or more of the specific details, or with other methods, components, devices, steps, and so forth. In other instances, well-known methods, devices, implementations or operations have not been shown or described in detail to avoid obscuring aspects of the invention. The flowcharts shown in the figures are illustrative only and do not necessarily include all of the contents and operations/steps, nor do they necessarily have to be performed in the order described.
In the related art, the opening size of the small window of the livestock house can be controlled in a manual adjustment mode or an automatic adjustment mode, but both the modes need to determine the initial opening of the small window in advance.
A typical manual inward-opening small window structure is shown in figure 1 and comprises a small window turning plate 1, a fixed pulley 2, a hand-operated wheel 4 and a traction rope (not shown in the figure), wherein personnel required for manual adjustment enter a feeding site, and the traction rope is pulled through the hand-operated wheel 4, so that the small window turning plate 1 is driven to rotate, and the purpose of adjusting the opening degree of a small window is achieved. Because the installation of small window is too high for inconvenient direct measurement its height, so can record the length of haulage rope usually, then according to the length manual calculation small window aperture of haulage rope, the process is loaded down with trivial details. The scheme has the problems that the opening of the small window is not timely adjusted and the opening of the small window is not reasonable enough, so that the ventilation management efficiency of the poultry and livestock house is limited, individual chickens are only cold stressed, and the health of chicken flocks is influenced.
A typical automatic inward-opening small window structure is shown in fig. 2, and compared with a manual control small window, the automatic inward-opening small window structure replaces a fixed pulley with a sliding block 2, two ends of the sliding block 2 are respectively connected with a speed reducer 3 and a hand wheel 4, the speed reducer 3 carries an encoder or a potentiometer, and the opening degree of the small window is obtained through the encoder or the potentiometer.
For the aperture control of the small window, the automatic adjustment mode is usually that the environment control system corresponds to a given small window aperture according to a given ventilation level, and only the small window aperture is associated with the ventilation volume, when the ventilation volume is required to be large, the aperture of the small window is correspondingly controlled to be increased, and when the air volume is small, the aperture of the small window is correspondingly controlled to be decreased, and the influence of the outside temperature on the ventilation effect is not considered in the mode. But only the small window is adjusted to a proper opening degree according to the outdoor temperature, and a good ventilation effect can be achieved on the premise of meeting the ventilation.
For example, in one scenario, summer outdoor temperature 38 ℃, house temperature 32 ℃, and target temperature 28 ℃. At the moment, because the target temperature is lower, in order to meet the cooling requirement, the environment control system can increase the ventilation quantity and timely remove indoor damp and hot air. As shown in figure 3, if all the small windows are opened to the maximum angle, the air inlet angle is declined, the air speed at the inlet is small, and the external high-temperature air is directly blown to the bodies of the chickens, so that the heat stroke of the chickens is caused. As shown in fig. 4, if the opening of the small window is adjusted to be too small, the air speed at the inlet is high, an air vortex is formed, air is thin at the center of the vortex, and the chicken breathes difficultly, so that oxygen deficiency is caused.
In another scenario, winter outdoor temperature is 2 ℃, indoor temperature is 20 ℃, and target temperature is 28 ℃. At this time, because the target temperature is high, in order to meet the requirement of heat preservation, the environment control system can reduce the ventilation volume and reduce the entrance of outdoor cold air. As shown in figure 5, if all the small windows are opened to a small angle, the air inlet angle is inclined upwards, the air speed at the inlet is high, and cold air is directly blown to the ceiling and returns back to hit the bodies of the chickens, so that the chickens are cooled. As shown in fig. 6, if the small window is closed, the air inlet volume is small, and the air cannot blow to the central axis of the house, the air is basically stagnant, so that oxygen is deficient in a part of the area; at the moment, if the opening of the small window is adjusted to be too large, the air speed at the inlet is very low, and the wet and cold air is directly blown onto the chicken body, so that the chicken is only cooled.
In both scenarios, only the ventilation conditions are considered, and the influence of the temperature on the ventilation effect is not considered.
In order to solve the above problems, the present exemplary embodiment provides a method and a device for controlling the opening of a small window of a poultry house, so as to obtain the current opening of the small window according to the initial opening and historical motion data of the small window, and control the opening of the small window based on the current opening of the small window, so as to achieve a better ventilation effect.
Example one
As shown in fig. 7, the method for controlling the opening of the small window of the livestock house provided by the invention comprises the following steps:
and step S702, acquiring the full-open time and the full-close time of the small window, wherein the full-open time is the time required by the small window from the closed state to the full-open state when the small window is controlled to move forwards, and the full-close time is the time required by the small window from the full-open state to the closed state when the small window is controlled to move backwards.
Step S704, acquiring an initial opening of the small window at the start of the first time period and a forward action time and a reverse forward action time of the small window in the first time period.
And step S706, acquiring the current opening degree of the small window according to the initial opening degree, the forward action time, the reverse action time, the full opening time and the full closing time.
Specifically, in step S706, the current opening degree of the small window is calculated according to the following formula
Wherein the content of the first and second substances,
to is the initial opening, To is the forward actuation time, To is the full opening time, Tc is the reverse actuation time, and Tc is the full closing time.
After step S706, the target opening of the small window needs to be obtained, and the small window is controlled to perform forward motion or reverse motion according to the target opening and the current opening.
The technical scheme of the invention can be realized by relying on PLC. Through the calculation process of the small window opening and the control process of the small window opening, the opening of the small window can be accurately positioned and controlled on the premise of not replacing small window equipment, the air mixing condition in the livestock and poultry house is improved, and the production cost is greatly reduced.
According to the scheme, the actual small window opening degree is obtained through simulation calculation under the condition that an opening degree sensor is not added, and the small window opening degree is controlled according to the small window target opening degree.
The calibration process for the small window may obtain the full on time To and the full off time Tc of the small window. In the small window opening control system as shown in fig. 8, the small window opening may be calibrated by a manual calibration method or an automatic calibration method.
As shown in fig. 8, the manual calibration does not use the forward limit signal and the reverse limit signal. The small window is manually operated on the human-computer interface 801, the small window is firstly adjusted To the highest position or the lowest position, then the forward motion or the reverse motion is carried out, the small window stops when reaching the lowest position or the highest position, and meanwhile, the time To taken by the full opening of the small window and the time Tc taken by the full closing of the small window, which are acquired by a timer, are recorded, so that the manual calibration process is completed.
Specifically, the manual calibration process comprises the steps of:
in step S801, calibration is started.
And step S802, homing.
Step S811 is a forward operation.
Step S812, time counting.
In step S813, the full open time To is acquired.
Step S821, the reverse operation.
Step S822, time counting.
In step S823, the total off time Tc is acquired.
In step S803, the calibration is completed.
Relative to manual calibration, automatic calibration must be coordinated with the forward limit signal and the reverse limit signal. The number of times of automatic calibration per day can be set, and when the small window is used for automatic calibration, the sequence of calibration actions is consistent with that of manual calibration, and the difference is that the judgment of the highest position and the lowest position in homing is provided by a forward limit signal and a reverse limit signal. When the automatic calibration is carried out, the small window automatically stops when reaching the lowest position or the highest position, and the time To for the full opening of the small window and the time Tc for the full closing of the small window, which are acquired by the timer, are recorded at the same time, so as To realize the automatic calibration.
As shown in fig. 9, after the calibration is completed, the initial opening degree of the small window
At the 0% or 100% position. Then the small window formally starts To act, records the time To of the forward action and the time Tc of the reverse action of the small window, and obtains the forward opening To/To and the reverse opening Tc/Tc of the small window according To the time To and the time Tc of the reverse action of the small window, so that the expression of the current opening of the small window is
I.e. the current opening of the small window is obtained by calculation. Further, when the small window acts again, recording the second forward acting time and the second reverse acting time of the small window, wherein the initial opening degree of the small window is the opening degree of the small window after the small window performs the first forward acting and the first reverse acting, and so on, when calculating the current opening degree of the small window after the small window performs the Nth forward acting and the Nth reverse acting, the initial opening degree of the small window is the opening degree of the small window after the small window performs the N-1 st forward acting and the N-1 st reverse acting, and N is a positive integer greater than 1. When N is 1, i.e. after the calibration of the small window is completed, the initial opening of the small window is at the 0% or 100% position.
Specifically, the small window opening calculation process includes the steps of:
in step S901, an initial opening of the small window is obtained.
Step S902, the widget operates.
Step S911, forward operation.
Step S912, time counting.
In step S913, the start operating time to is acquired.
In step S914, To/To is obtained.
Step S921, reverse operation.
Step S922, time counting.
In step S923, the closing operation time tc is obtained.
In step S924, Tc/Tc is obtained.
Step S903, calculating
Step S904, completion.
In the first embodiment of the invention, the position mode is adopted to control the opening of the small window. The current opening degree of the small window can be obtained through the small window calibration process shown in fig. 8 and the opening degree simulation calculation process shown in fig. 9. And under the position mode, acquiring the current opening degree of the small window and the target opening degree of the small window, and controlling the small window to perform forward action or reverse action according to the target opening degree of the small window and the current opening degree of the small window. In some embodiments, the opening degree of the small window is controlled according to the current opening degree of the small window, the minimum opening degree of the small window and the target opening degree of the small window, wherein the minimum opening degree of the small window is the minimum value which needs to be met by the opening degree of the small window. Specifically, the current opening degree of the small window, the minimum opening degree of the small window and the target opening degree of the small window are obtained, and when the target opening degree of the small window is smaller than or equal to the minimum opening degree of the small window, the small window is controlled not to act; when the target opening degree of the small window is larger than the minimum opening degree of the small window, the small window is controlled to perform forward action or reverse action, namely, the opening degree of the small window is opened to the target opening degree of the small window, and therefore the air in the poultry and livestock house is adjusted.
Example two
Under different temperature conditions, only the opening of the small window is controlled, so that good air mixing and ventilation effects cannot be realized, and even the chicken flock is in cold stress and oxygen deficiency conditions, therefore, on the basis of the first embodiment, the second embodiment adopts a pressure difference mode to replace a position mode to control the opening of the small window.
Specifically, the louver opening degree may be associated with the inside and outside negative pressure. Since the house negative pressure has a large relationship with the house external temperature, this requirement can be simulated using a simple linear relationship as shown in fig. 10, adjusting the target negative pressure under different house external temperature conditions. In winter with low temperature, the required house negative pressure is high, and in order to obtain higher house negative pressure, the small window can be controlled to be in a smaller opening; on the contrary, in summer with high temperature, the required house negative pressure is low, and the small window can be controlled to be in a larger opening degree in order to obtain lower house negative pressure.
Fig. 11 is a schematic diagram showing the relationship between the opening degree of the small window and the negative pressure in the differential pressure mode. Controlling the opening of the small window according to the curves of the negative pressure inside the house and the temperature outside the house shown in fig. 10 and the relation diagram of the minimum opening of the small window and the negative pressure shown in fig. 11 can improve the air circulation inside the house, so that the air improvement effect inside the house is better.
As shown in fig. 12, the method for controlling the opening of the small window of the livestock house according to the embodiment of the present invention may include steps S702, S704, S706, and the following steps:
in step S707, the outside temperature, the set temperature range, and the set negative pressure range of the livestock house are acquired.
In step S708, a target negative pressure is determined based on the exterior temperature, the set temperature range, and the set negative pressure range.
Step S709, determining a target opening degree of the small window according to the target negative pressure.
And step S710, controlling the small window to perform forward motion or reverse motion according to the target opening and the current opening.
Determining the target negative pressure according to the outside temperature, the set temperature range and the set negative pressure range comprises: the target negative pressure P is determined according to the following formulax，
Wherein, PXFor the target negative pressure, T is the outside temperature, P1 and P2 are the upper and lower limits of the set negative pressure range, respectively, and T1 and T2 are the upper and lower limits of the set temperature range, respectively.
After step S708, it may be determined whether the target negative pressure is within the set negative pressure range. If the target negative pressure is within the set negative pressure range, a non-action area can be set within the set negative pressure range according to the target negative pressure, and if the current negative pressure is within the range of the non-action area, the small window is controlled not to act.
When a non-operation region is set in the set negative pressure range according to the target negative pressure, the non-operation region can be set to ((P)x-△P/2)，(Px+. DELTA P/2)), if the current negative pressure is within the inactive area, it is formulated as: (P)x-△P/2)≤P≤(Px+. DELTA P/2), where P is the current negative pressure, DELTA P is a first threshold value, PxIs the target negative pressure. The condition that the pressure is influenced by gust can be solved by setting the non-action area in the target negative pressure range.
And if the time for the small window to perform the forward action or the reverse action is determined to be less than the second threshold according to the target opening and the current opening, controlling the duration of the continuous action of the small window by the second threshold. And after the small window is controlled to finish the forward action or the reverse action according to the target opening and the current opening, controlling the duration of the small window to continuously perform the forward action or the reverse action for a third threshold value.
The time delay action is executed during each small window action, so that the small window can not act frequently; the shortest action time is set for each small window action, so that the small window can be prevented from shaking.
EXAMPLE III
As shown in fig. 13, the present invention utilizes a combination of a human-machine interface 1301 and a PLC 1302 to form a small window opening control system, so as to execute the control method of the first embodiment or the second embodiment. The PLC simulates and calculates the opening of the small window by acquiring the forward motion time, the reverse motion time, the full opening time and the full closing time of the forward rotation speed reducer 1303 and the reverse rotation speed reducer 1304, wherein the full opening time and the full closing time are realized by manual calibration or automatic calibration, the forward rotation limit protector 1305 and the reverse rotation limit protector 1306 can prevent mechanical damage, and negative pressure is obtained by using the negative pressure sensor 1307 to control the opening of the small window under the condition of meeting the minimum opening.
In the process of controlling the opening of the small window of the livestock house, the negative pressure is required to be high in winter, for example, 15Pa to 30Pa, and the negative pressure is required to be low in summer, and the value is 5Pa to 15 Pa. As shown in fig. 14, the technical solution of the embodiment of the present invention can ensure that the small window is controlled at a proper opening by negative pressure, and fresh air can reach the central area of the roof and fall down after entering from the small window, and the process mixes the fresh air and the air in the house, and the opening of the small window is limited by a minimum opening, so that the situation that air is directly blown onto the body of the chicken is not generated, the occurrence of cold and heat stress is reduced, and the situation that oxygen is deficient in a part of the area can be prevented.
The present invention also provides a control device for the opening degree of the small window of the livestock house, which is applied to the control method for the opening degree of the small window of the livestock house in the above embodiments.
According to the control method and the control device for the opening of the small window of the livestock house, the current opening of the small window is obtained through obtaining the initial opening, the historical action data and the full-opening and full-closing time of the small window, so that the small window is opened and closed.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
It will be understood that the invention is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.
Claims (10)
1. A control method for the opening degree of a small window of a livestock shed is characterized by comprising the following steps:
acquiring full-open time and full-close time of the small window, wherein the full-open time is the time required by the small window from a closed state to a full-open state when the small window is controlled to move in a forward direction, and the full-close time is the time required by the small window from the full-open state to the closed state when the small window is controlled to move in a reverse direction;
acquiring the initial opening of the small window at the starting point of a first time period and the forward action time and the reverse forward action time of the small window in the first time period;
and acquiring the current opening degree of the small window according to the initial opening degree, the forward action time, the reverse action time, the full opening time and the full closing time.
2. The control method according to claim 1, wherein the acquiring the current opening degree of the small window includes: calculating the current opening degree of the small window according to the following formula
Wherein the content of the first and second substances,
the initial opening degree is To be the forward action time, To is the full opening time, Tc is the reverse action time, and Tc is the full closing time.
3. The control method according to claim 1, wherein after the current opening degree of the small window is acquired, the control method further comprises:
acquiring the target opening degree of the small window;
and controlling the small window to perform forward action or reverse action according to the target opening and the current opening.
4. The control method according to claim 1, wherein after the current opening degree of the small window is obtained, the control method further comprises:
acquiring the out-house temperature, the set temperature range and the set negative pressure range of the livestock house;
determining a target negative pressure according to the out-of-house temperature, the set temperature range and the set negative pressure range;
determining the target opening degree of the small window according to the target negative pressure;
and controlling the small window to perform forward action or reverse action according to the target opening and the current opening.
5. The control method according to claim 1, wherein after the current opening degree of the small window is acquired, the control method further comprises:
acquiring the out-house temperature, the set temperature range and the set negative pressure range of the livestock house;
determining a target negative pressure according to the out-of-house temperature, the set temperature range and the set negative pressure range;
and if the target negative pressure is in the set negative pressure range, setting a non-action area in the set negative pressure range according to the target negative pressure, and if the current negative pressure is in the non-action area range, controlling the small window to be non-action.
6. The control method according to claim 4 or 5, wherein the determining a target negative pressure based on the outside temperature, the set temperature range, and the set negative pressure range includes: determining the target negative pressure P according to the following formulax，
Wherein, PXFor the target negative pressure, T is the house outside temperature, P1 and P2 are the upper and lower limits, respectively, of the set negative pressure range, and T1 and T2 are the upper and lower limits, respectively, of the set temperature range.
7. The control method according to claim 5, wherein a non-operation region is set in the set negative pressure range according to the target negative pressure, and if the current negative pressure is in the non-operation region, the non-operation region is formulated as: (P)x-△P/2)≤P≤(Px+. DELTA P/2), where P is the current negative pressure, DELTA P is a first threshold value, PxThe target negative pressure is obtained.
8. The control method according to claim 3, characterized in that if it is determined that the time for the small window to perform the forward motion or the reverse motion is less than a second threshold value according to the target opening degree and the current opening degree, the duration for the small window to continuously act on the second threshold value is controlled.
9. The control method according to claim 3, wherein after controlling the widget to complete the forward motion or the reverse motion according to the target opening and the current opening, the widget is controlled to continue for a duration of a third threshold value of the forward motion or the reverse motion.
10. A control device for the opening of a window of a poultry house, characterized in that the control device is applied to perform a control method for the opening of a window of a poultry house according to any one of claims 1 to 9.
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| CN202011538519.7A CN114658316A (en) | 2020-12-23 | 2020-12-23 | Method and device for controlling opening of small window of livestock house |
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| JPH08308413A (en) * | 1995-05-17 | 1996-11-26 | Rika:Kk | Automatic window-opening device of window-less rearing house on electric power failure |
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| CN109220885A (en) * | 2018-09-29 | 2019-01-18 | 河南万华畜牧设备有限公司 | Laying hen field free-ranging vehicle |
| CN110083189A (en) * | 2019-03-29 | 2019-08-02 | 广东南牧机械设备有限公司 | Aeration control method, device, system and raising workshop |
| CN112075347A (en) * | 2020-09-09 | 2020-12-15 | 中国农业大学 | Ventilation zone control method for livestock and poultry house |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08308413A (en) * | 1995-05-17 | 1996-11-26 | Rika:Kk | Automatic window-opening device of window-less rearing house on electric power failure |
| CN101589906A (en) * | 2008-05-30 | 2009-12-02 | 当代天启技术（北京）有限公司 | A kind of curtain opening size conditioning system |
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