CN113759780A - Double-unit control method and system and special air conditioner - Google Patents
Double-unit control method and system and special air conditioner Download PDFInfo
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- CN113759780A CN113759780A CN202111022339.8A CN202111022339A CN113759780A CN 113759780 A CN113759780 A CN 113759780A CN 202111022339 A CN202111022339 A CN 202111022339A CN 113759780 A CN113759780 A CN 113759780A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/49—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring ensuring correct operation, e.g. by trial operation or configuration checks
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/88—Electrical aspects, e.g. circuits
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
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Abstract
The invention relates to a double-unit control method, a double-unit control system and a special air conditioner. Compared with the technical scheme of carrying out double-unit switching by transmitting communication signals in the prior art, the technical scheme provided by the invention has the advantages of stronger anti-interference capability, higher unit switching success rate and more reliable system.
Description
Technical Field
The invention relates to the technical field of electric control equipment, in particular to a double-unit control method and system and a special air conditioner.
Background
The dual-unit operation is a networking scheme provided for improving the stability of the system.
Taking a special air conditioner as an example, a special air conditioner client puts forward the requirement that two air conditioner units are not primary and secondary and are backup to each other, and switching is performed immediately every X hours, so as to ensure that at least one air conditioner unit is in an operating state in the using process. The requirement can be realized by using conventional communication, but if conditions such as high radiation, strong magnetic field and the like exist in a using scene of a client, communication can be possibly interfered, and the switching failure of the air conditioning unit is caused.
The special air conditioning unit is a refrigeration air conditioning product specially designed and manufactured for meeting air conditioning of certain special environments and process places, is widely applied to the national economy key industry fields of electric power, communication, traffic, metallurgy, aerospace, electronics, machinery, chemical industry, medical science and defense, military industry, national defense, tobacco, municipal administration, light industry, cultural and education and the like, and can adapt to extreme temperature and humidity environments with the temperature of-40 to +80 ℃ and the humidity of 0-100% and large-range altitude environments with the altitude of 0-6000 meters in different application industry occasions.
In the prior art, a technical scheme for realizing the switching of the starting instructions of the two units based on the relay exists, but the switching is only a simple on-off detection operation, and once the standby unit misses the moment of the switching instruction, the switching failure is caused, and the abnormal phenomenon that the two units are both closed occurs.
Disclosure of Invention
In view of the above, the present invention provides a dual-unit control method, a dual-unit control system and a special air conditioner, so as to solve the problem that the dual-unit cannot be reliably switched in the prior art.
According to a first aspect of the embodiments of the present invention, there is provided a dual-unit control method, applied to a first unit, including:
detecting the running state of the first unit;
when the running state of the first unit is on and the running state needs to be switched from on to off, outputting a switching signal to the second unit through the first switching element so that the second unit starts to start after detecting the switching signal, and feeding back another switching signal through the second switching element after the second unit is normally started;
after receiving a switching signal fed back by the second unit, closing the first unit;
the first switch element is connected between the output end of the first unit and the input end of the second unit;
the second switching element is connected between the output of the second unit and the input of the first unit.
Preferably, the outputting a switching signal to the second unit through the first switching element includes:
when the operation state of the first unit is open and the operation state needs to be switched from open to closed,
outputting a first switching signal to the second unit through the first switching element so that the second unit starts to start after detecting the first switching signal, and feeding back a second switching signal through the second switching element;
after the second switching signal is detected, outputting a third switching signal to the second unit through the first switching element to inform the second unit that the second unit is waiting for the second unit to be started;
and if a fourth switching signal which is fed back by the second unit through the second switching element and is normally started is received in the third switching signal duration, stopping outputting the third switching signal and closing the first unit.
Preferably, the duration of the first switching signal, the duration of the second switching signal, and the duration of the third switching signal are all different;
the duration of the fourth switching signal is less than the duration of the third switching signal;
alternatively, the first and second electrodes may be,
the duration of the first switching signal, the duration of the second switching signal and the duration of the third switching signal are the same;
the duration of the fourth switching signal is less than the duration of the third switching signal.
According to a second aspect of embodiments of the present invention, there is provided a train control system including:
the detection module is used for detecting the running state of the first unit;
the output module is used for outputting a switching signal to the second unit through the first switching element when the running state of the first unit is started and the running state needs to be switched from on to off, so that the second unit starts to be started after the switching signal is detected, and feeds back another switching signal through the second switching element after the second unit is normally started;
the switching module is used for closing the first unit after receiving a switching signal fed back by the second unit;
the first switch element is connected between the output end of the first unit and the input end of the second unit;
the second switching element is connected between the output of the second unit and the input of the first unit.
According to a third aspect of the embodiments of the present invention, there is provided a dual-unit control method, applied to a second unit, including:
detecting the running state of the second unit and whether the input end connected with the first switch element receives a switch signal sent by the first unit;
when the second unit is in a closed state and receives a switching signal sent by the first unit, starting the second unit, and after the second unit is normally started, feeding back another switching signal through a second switching element so as to close the first unit after the first unit receives the fed-back switching signal;
the first switch element is connected between the output end of the first unit and the input end of the second unit;
the second switching element is connected between the output of the second unit and the input of the first unit.
Preferably, the feeding back of the another switching signal by the second switching element includes:
starting after detecting a first switching signal which is output by the first switching element and used for informing switching of the first unit, and feeding back a second switching signal to the first unit through the second switching element, so that after detecting the second switching signal, the first unit outputs a third switching signal which is used for informing the second unit of waiting for starting of the second unit through the first switching element;
and after the third switching signal is detected, if the second unit is normally started, feeding a fourth switching signal back to the first unit, so that the first unit stops outputting the third switching signal and closes the first unit after receiving the fourth switching signal in the duration of the third switching signal.
Preferably, the duration of the first switching signal, the duration of the second switching signal, and the duration of the third switching signal are all different;
the duration of the fourth switching signal is less than the duration of the third switching signal;
alternatively, the first and second electrodes may be,
the duration of the first switching signal, the duration of the second switching signal and the duration of the third switching signal are the same;
the duration of the fourth switching signal is less than the duration of the third switching signal.
According to a fourth aspect of the embodiments of the present invention, there is provided a unit control system including:
the detection module is used for detecting the running state of the second unit and whether the input end connected with the first switch element receives a switch signal sent by the first unit;
the starting module is used for starting the second unit when the running state of the second unit is closed and the switching signal sent by the first unit is received, and feeding back another switching signal through the second switching element after the second unit is normally started, so that the first unit is closed after the first unit receives the fed-back switching signal;
the first switch element is connected between the output end of the first unit and the input end of the second unit;
the second switching element is connected between the output of the second unit and the input of the first unit.
According to a fifth aspect of the embodiments of the present invention, there is provided a dual-unit control system, including:
the first switch element is connected between the output end of the first unit and the input end of the second unit;
the second switch element is connected between the output end of the second unit and the input end of the first unit;
the unit control system is arranged in the first unit; and/or the presence of a gas in the gas,
the unit control system is arranged in the second unit.
Preferably, the first unit and the second unit are special air conditioners.
According to a sixth aspect of the embodiments of the present invention, there is provided a special type air conditioner including:
the above-described unit control system; alternatively, the first and second electrodes may be,
the unit control system is described above.
The technical scheme provided by the embodiment of the invention can have the following beneficial effects:
the first unit and the second unit transmit the switching signals through the switching elements, so that the two units mutually confirm the switching signals, and the shutdown of all the units caused by the switching failure of the units is effectively prevented. Compared with the technical scheme of carrying out double-unit switching by transmitting communication signals in the prior art, the technical scheme provided by the invention has the advantages of stronger anti-interference capability, higher unit switching success rate and more reliable system.
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 invention, as claimed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
FIG. 1 is a flow chart illustrating a dual-cluster control method in accordance with an exemplary embodiment;
FIG. 2 is a schematic block diagram illustrating a dual-cluster control system in accordance with an exemplary embodiment;
FIG. 3 is a timing diagram illustrating switching signals for a dual-consist control system according to an exemplary embodiment;
FIG. 4 is a schematic block diagram illustrating a fleet control system in accordance with an exemplary embodiment;
FIG. 5 is a flow chart illustrating a dual-cluster control method according to another exemplary embodiment;
FIG. 6 is a schematic block diagram illustrating a fleet control system in accordance with another exemplary embodiment;
FIG. 7 is a block diagram illustrating a block switching flow diagram for a dual-block control system in accordance with an exemplary embodiment;
fig. 8 is a block diagram illustrating a block switching flow diagram for a dual-block control system according to another exemplary embodiment.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the invention, as detailed in the appended claims.
Example one
Fig. 1 is a flowchart illustrating a dual-unit control method according to an exemplary embodiment, where the method is applied to a first unit, and as shown in fig. 1, the method includes:
step S11, detecting the running state of the first unit;
step S12, when the operation state of the first unit is on and needs to be switched from on to off, outputting a switching signal to the second unit through the first switching element, so that the second unit starts to start after detecting the switching signal, and after the second unit is normally started, feeding back another switching signal through the second switching element;
step S13, after receiving the switching signal fed back by the second unit, closing the first unit;
the first switch element is connected between the output end of the first unit and the input end of the second unit;
the second switching element is connected between the output of the second unit and the input of the first unit.
It should be noted that the technical solution provided in this embodiment is applicable to any unit in the dual-unit control system. The first switch element and the second switch element may be relays, and a schematic block diagram of the dual-unit control system may be shown in fig. 2.
Referring to fig. 2, in a specific practice, the first unit a and the second unit B are the same type of electric equipment, for example, the first unit a and the second unit B are both special air conditioners, the first unit a and the second unit B are both servers, and the like.
In specific practice, the first unit a may be set as a primary device, and the second unit B may be set as a standby device; or, the first unit a is set as the main device, and the second unit B is set as the standby device. The "first unit" and the "second unit" are only for distinguishing two units of the two units, and do not limit the difference in function or status between the two units. In particular practice, the two sets may be used interchangeably.
It should be noted that, referring to fig. 2, a controller DO Output end (Digital Output) of the first unit a or the second unit B may be controlled by a program to Output a high/low level, and when the DO Output end of the first unit a outputs a high level, a coil of the first relay K1 is energized to pull the first relay K1 to be closed; when the DO output end of the second unit B outputs a high level, the coil of the second relay K2 is electrified, and the attraction second relay K2 is closed.
The controller of the first unit a or the second unit B may detect a high/low level input from a di (digital input) input terminal. When the relay of the first unit A is closed, the VCC and DI input ends of the controller of the first unit A form a closed loop, and at the moment, the controller of the first unit A can detect a high-level signal; when the relay of the second unit B is engaged, the VCC and DI input terminals of the controller of the second unit B form a closed loop, and at this time, the controller of the second unit B can detect a high level signal.
In summary, the first relay K1 is controlled to be closed by the DO output terminal of the first unit a, and the second unit B can distinguish the time and the maintaining time of the high level signal output by the ADO output terminal of the first unit, and the second unit B is the same.
The first unit A and the second unit B can mutually detect high level signals output by the other side, namely I/O (input/output) signals can be mutually transmitted to detect the time for attracting the relay, so that abnormal control caused by false triggering can be effectively avoided, and the timing sequence of attracting the relay of the first unit A and the second unit B is equivalent to signal confirmation on analog communication, so that the control reliability is improved.
Therefore, according to the technical scheme provided by the embodiment, the first unit A and the second unit B transmit the switching signals through the relay, so that the two units mutually confirm the switching signals, and the shutdown of all the units caused by the unit switching failure is effectively prevented. Compared with the technical scheme of carrying out double-unit switching by transmitting communication signals in the prior art, the technical scheme provided by the embodiment has the advantages of stronger anti-interference capability, higher unit switching success rate and more reliable system.
In a specific practice, the switching of the operation states of the first unit a and the second unit B shown in fig. 2 can be controlled by using the switching signal timing chart shown in fig. 3.
Specifically, the first unit a outputs a switching signal to the second unit B through the first relay K1, including:
when the operation state of the first unit A is open and the operation state needs to be switched from open to closed,
the first unit A outputs a first switching signal A1 (indicating that a switching command is sent) to the second unit B through a first relay K1, so that the second unit B starts to start after detecting the first switching signal A1, and feeds back a second switching signal B1 (indicating that the switching command of the first unit A is responded) through a second relay K2;
after detecting the second switching signal B1, the first unit A outputs a third switching signal A2 to the second unit B through a first relay K1 to inform the second unit B that the second unit B is waiting for the second unit B to be started;
if the first unit a receives the normally turned-on fourth switching signal B2 fed back by the second unit B through the second relay K2 during the duration of the third switching signal a2, the output of the third switching signal a2 is stopped, and the first unit a is turned off.
In the above, referring to fig. 3, the first unit a and the second unit B complete a complete switching control sequence. When the next control sequence comes, the switching process is continuously repeated. The difference is that when the next control sequence comes, the second unit B is switched to the first unit A.
In specific practice, the durations of the first switching signal a1, the second switching signal B1, and the third switching signal a2 may all be different; the duration of the fourth switching signal B2 is less than the duration of the third switching signal A2; as long as the first unit and the second unit can distinguish the first switching signal a1, the second switching signal B1, the third switching signal a2 and the fourth switching signal B2;
however, the duration of the first switch signal a1, the duration of the second switch signal B1, and the duration of the third switch signal a2 may be the same, for example, as shown in fig. 3, the duration of the first switch signal a1, the duration of the second switch signal B1, and the duration of the third switch signal a2 are all t1, and t1 > 0.
The duration of the fourth switching signal B2 is less than the duration of the third switching signal a2, for example, as shown in fig. 3, the duration of the fourth switching signal B2 is t2, and 0< t2< t 1.
It can be understood that, according to the technical scheme provided by this embodiment, through the multi-turn signal confirmation of the first unit and the second unit, the switching to the second unit is completed before the first unit is turned off, thereby effectively preventing all units from being turned off due to unit switching failure, and having higher unit switching success rate and more reliable system.
Example two
Fig. 4 is a schematic block diagram illustrating a fleet control system 100, according to an exemplary embodiment, the system 100, as shown in fig. 4, including:
the detection module 101 is used for detecting the running state of the first unit;
the output module 102 is configured to output a switching signal to the second unit through the first switching element when the operating state of the first unit is on and the operating state needs to be switched from on to off, so that the second unit starts to be started after detecting the switching signal, and feeds back another switching signal through the second switching element after being normally started;
the switching module 103 is configured to close the first unit after receiving a switching signal fed back by the second unit;
the first switch element is connected between the output end of the first unit and the input end of the second unit;
the second switching element is connected between the output of the second unit and the input of the first unit.
It should be noted that, the technical solution provided in this embodiment is applicable to a first unit in a dual-unit control system, the first switching element and the second switching element may adopt relays, and a schematic block diagram of the dual-unit control system may be as shown in fig. 2.
Referring to fig. 2, in a specific practice, the first unit a and the second unit B are the same type of electric equipment, for example, the first unit a and the second unit B are both special air conditioners, the first unit a and the second unit B are both servers, and the like.
In specific practice, the first unit a may be set as a primary device, and the second unit B may be set as a standby device; or, the first unit a is set as the main device, and the second unit B is set as the standby device. The "first unit" and the "second unit" are only for distinguishing two units of the two units, and do not limit the difference in function or status between the two units. In particular practice, the two sets may be used interchangeably.
It should be noted that, referring to fig. 2, a controller DO Output end (Digital Output) of the first unit a or the second unit B may be controlled by a program to Output a high/low level, and when the DO Output end of the first unit a outputs a high level, a coil of the first relay K1 is energized to pull the first relay K1 to be closed; when the DO output end of the second unit B outputs a high level, the coil of the second relay K2 is electrified, and the attraction second relay K2 is closed.
The controller of the first unit a or the second unit B may detect a high/low level input from a di (digital input) input terminal. When the relay of the first unit A is closed, the VCC and DI input ends of the controller of the first unit A form a closed loop, and at the moment, the controller of the first unit A can detect a high-level signal; when the relay of the second unit B is engaged, the VCC and DI input terminals of the controller of the second unit B form a closed loop, and at this time, the controller of the second unit B can detect a high level signal.
In summary, the first relay K1 is controlled to be closed by the DO output terminal of the first unit a, and the second unit B can distinguish the time and the maintaining time of the high level signal output by the ADO output terminal of the first unit, and the second unit B is the same.
The first unit A and the second unit B can mutually detect high level signals output by the other side, namely I/O (input/output) signals can be mutually transmitted to detect the time for attracting the relay, so that abnormal control caused by false triggering can be effectively avoided, and the timing sequence of attracting the relay of the first unit A and the second unit B is equivalent to signal confirmation on analog communication, so that the control reliability is improved.
In a specific practice, according to the technical solution provided by this embodiment, the switching signal timing chart shown in fig. 3 may be used to control the first unit a and the second unit B shown in fig. 2 to switch the operation states. For details, reference may be made to the description of the first embodiment, and details are not described in this embodiment.
Therefore, according to the technical scheme provided by the embodiment, the first unit A and the second unit B transmit the switching signals through the relay, so that the two units mutually confirm the switching signals, and the shutdown of all the units caused by the unit switching failure is effectively prevented. Compared with the technical scheme of carrying out double-unit switching by transmitting communication signals in the prior art, the technical scheme provided by the embodiment has the advantages of stronger anti-interference capability, higher unit switching success rate and more reliable system.
EXAMPLE III
Fig. 5 is a flowchart illustrating a dual-unit control method applied to a second unit according to another exemplary embodiment, where the method includes:
step S21, detecting the running state of the second unit and whether the input end connected with the first switch element receives the switch signal sent by the first unit;
step S22, when the second unit is in a closed state and receives a switching signal sent by the first unit, starting the second unit, and after the second unit is normally started, feeding back another switching signal through the second switching element, so that the first unit is closed after receiving the fed-back switching signal;
the first switch element is connected between the output end of the first unit and the input end of the second unit;
the second switching element is connected between the output of the second unit and the input of the first unit.
It should be noted that, the technical solution provided in this embodiment is applicable to any unit in a dual-unit control system, the first switching element and the second switching element may adopt relays, and a schematic block diagram of the dual-unit control system may be as shown in fig. 2.
Referring to fig. 2, in a specific practice, the first unit a and the second unit B are the same type of electric equipment, for example, the first unit a and the second unit B are both special air conditioners, the first unit a and the second unit B are both servers, and the like.
In specific practice, the first unit a may be set as a primary device, and the second unit B may be set as a standby device; or, the first unit a is set as the main device, and the second unit B is set as the standby device. The "first unit" and the "second unit" are only for distinguishing two units of the two units, and do not limit the difference in function or status between the two units. In particular practice, the two sets may be used interchangeably.
It should be noted that, referring to fig. 2, a controller DO Output end (Digital Output) of the first unit a or the second unit B may be controlled by a program to Output a high/low level, and when the DO Output end of the first unit a outputs a high level, a coil of the first relay K1 is energized to pull the first relay K1 to be closed; when the DO output end of the second unit B outputs a high level, the coil of the second relay K2 is electrified, and the attraction second relay K2 is closed.
The controller of the first unit a or the second unit B may detect a high/low level input from a di (digital input) input terminal. When the relay of the first unit A is closed, the VCC and DI input ends of the controller of the first unit A form a closed loop, and at the moment, the controller of the first unit A can detect a high-level signal; when the relay of the second unit B is engaged, the VCC and DI input terminals of the controller of the second unit B form a closed loop, and at this time, the controller of the second unit B can detect a high level signal.
In summary, the first relay K1 is controlled to be closed by the DO output terminal of the first unit a, and the second unit B can distinguish the time and the maintaining time of the high level signal output by the ADO output terminal of the first unit, and the second unit B is the same.
The first unit A and the second unit B can mutually detect high level signals output by the other side, namely I/O (input/output) signals can be mutually transmitted to detect the time for attracting the relay, so that abnormal control caused by false triggering can be effectively avoided, and the timing sequence of attracting the relay of the first unit A and the second unit B is equivalent to signal confirmation on analog communication, so that the control reliability is improved.
Therefore, according to the technical scheme provided by the embodiment, the first unit A and the second unit B transmit the switching signals through the relay, so that the two units mutually confirm the switching signals, and the shutdown of all the units caused by the unit switching failure is effectively prevented. Compared with the technical scheme of carrying out double-unit switching by transmitting communication signals in the prior art, the technical scheme provided by the embodiment has the advantages of stronger anti-interference capability, higher unit switching success rate and more reliable system.
In a specific practice, the switching of the operation states of the first unit a and the second unit B shown in fig. 2 can be controlled by using the switching signal timing chart shown in fig. 3.
Specifically, the second unit B feeds back another switching signal through the second relay K2, including:
the second unit B starts to start after detecting a first switching signal A1 which is output by the first relay K1 and used for notifying switching, and feeds back a second switching signal B1 (indicating responding to a switching command of the first unit A) to the first unit A through a second relay K2, so that the first unit A outputs a third switching signal A2 which is used for notifying the second unit B to wait for the second unit B to start after detecting the second switching signal B1 through a first relay K1;
after detecting the third switching signal a2, if the second unit B is normally started, the second unit B feeds back a fourth switching signal B2 (indicating that the second unit B is normally started) to the first unit a, so that the first unit a stops outputting the third switching signal a2 and closes the first unit a after receiving the fourth switching signal B2 (indicating that the second unit B is smoothly switched and started) during the duration of the third switching signal a 2.
In the above, referring to fig. 3, the first unit a and the second unit B complete a complete switching control sequence. When the next control sequence comes, the switching process is continuously repeated. The difference is that when the next control sequence comes, the second unit B is switched to the first unit A.
In specific practice, the durations of the first switching signal a1, the second switching signal B1, and the third switching signal a2 may all be different; the duration of the fourth switching signal B2 is less than the duration of the third switching signal A2; as long as the first unit and the second unit can distinguish the first switching signal a1, the second switching signal B1, the third switching signal a2 and the fourth switching signal B2;
however, the duration of the first switch signal a1, the duration of the second switch signal B1, and the duration of the third switch signal a2 may be the same, for example, as shown in fig. 3, the duration of the first switch signal a1, the duration of the second switch signal B1, and the duration of the third switch signal a2 are all t1, and t1 > 0.
The duration of the fourth switching signal B2 is less than the duration of the third switching signal a2, for example, as shown in fig. 3, the duration of the fourth switching signal B2 is t2, and 0< t2< t 1.
It can be understood that, according to the technical scheme provided by this embodiment, through the multi-turn signal confirmation of the first unit and the second unit, the switching to the second unit is completed before the first unit is turned off, thereby effectively preventing all units from being turned off due to unit switching failure, and having higher unit switching success rate and more reliable system.
Example four
Fig. 6 is a schematic block diagram illustrating a fleet control system 200, according to another exemplary embodiment, the system 200, as shown in fig. 6, including:
the detection module 201 is configured to detect an operating state of the second unit and whether an input end connected to the first switching element receives a switching signal sent by the first unit;
the starting module 202 is configured to start the second unit when the second unit is in a closed state and receives a switching signal sent by the first unit, and feed back another switching signal through the second switching element after the second unit is normally started, so that the first unit is closed after receiving the fed-back switching signal;
the first switch element is connected between the output end of the first unit and the input end of the second unit;
the second switching element is connected between the output of the second unit and the input of the first unit.
It should be noted that, the technical solution provided in this embodiment is applicable to a second unit in a dual-unit control system, the first switching element and the second switching element may adopt relays, and a schematic block diagram of the dual-unit control system may be as shown in fig. 2.
Referring to fig. 2, in a specific practice, the first unit a and the second unit B are the same type of electric equipment, for example, the first unit a and the second unit B are both special air conditioners, the first unit a and the second unit B are both servers, and the like.
In specific practice, the first unit a may be set as a primary device, and the second unit B may be set as a standby device; or, the first unit a is set as the main device, and the second unit B is set as the standby device. The "first unit" and the "second unit" are only for distinguishing two units of the two units, and do not limit the difference in function or status between the two units. In particular practice, the two sets may be used interchangeably.
It should be noted that, referring to fig. 2, a controller DO Output end (Digital Output) of the first unit a or the second unit B may be controlled by a program to Output a high/low level, and when the DO Output end of the first unit a outputs a high level, a coil of the first relay K1 is energized to pull the first relay K1 to be closed; when the DO output end of the second unit B outputs a high level, the coil of the second relay K2 is electrified, and the attraction second relay K2 is closed.
The controller of the first unit a or the second unit B may detect a high/low level input from a di (digital input) input terminal. When the relay of the first unit A is closed, the VCC and DI input ends of the controller of the first unit A form a closed loop, and at the moment, the controller of the first unit A can detect a high-level signal; when the relay of the second unit B is engaged, the VCC and DI input terminals of the controller of the second unit B form a closed loop, and at this time, the controller of the second unit B can detect a high level signal.
In summary, the first relay K1 is controlled to be closed by the DO output terminal of the first unit a, and the second unit B can distinguish the time and the maintaining time of the high level signal output by the ADO output terminal of the first unit, and the second unit B is the same.
The first unit A and the second unit B can mutually detect high level signals output by the other side, namely I/O (input/output) signals can be mutually transmitted to detect the time for attracting the relay, so that abnormal control caused by false triggering can be effectively avoided, and the timing sequence of attracting the relay of the first unit A and the second unit B is equivalent to signal confirmation on analog communication, so that the control reliability is improved.
In a specific practice, according to the technical solution provided by this embodiment, the switching signal timing chart shown in fig. 3 may be used to control the first unit a and the second unit B shown in fig. 2 to switch the operation states. For details, reference may be made to the description of the first embodiment, and details are not described in this embodiment.
Therefore, according to the technical scheme provided by the embodiment, the first unit A and the second unit B transmit the switching signals through the relay, so that the two units mutually confirm the switching signals, and the shutdown of all the units caused by the unit switching failure is effectively prevented. Compared with the technical scheme of carrying out double-unit switching by transmitting communication signals in the prior art, the technical scheme provided by the embodiment has the advantages of stronger anti-interference capability, higher unit switching success rate and more reliable system.
EXAMPLE five
FIG. 2 is a schematic block diagram illustrating a fleet control system, as shown in FIG. 2, in accordance with an exemplary embodiment, including:
the first switch element is connected between the output end of the first unit A and the input end of the second unit B;
the second switch element is connected between the output end of the second unit B and the input end of the first unit A;
the unit control system according to the second embodiment is installed in the first unit a; and/or the presence of a gas in the gas,
the unit control system according to the fourth embodiment is installed in the second unit B.
Referring to fig. 2, in a specific practice, the first switching element and the second switching element may employ a relay. The first unit a and the second unit B are the same type of electric equipment, for example, the first unit a and the second unit B are both special air conditioners, and the first unit a and the second unit B are both servers.
In specific practice, the first unit a may be set as a primary device, and the second unit B may be set as a standby device; or, the first unit a is set as the main device, and the second unit B is set as the standby device. The "first unit" and the "second unit" are only for distinguishing two units of the two units, and do not limit the difference in function or status between the two units. In particular practice, the two sets may be used interchangeably.
It should be noted that, referring to fig. 2, a controller DO Output end (Digital Output) of the first unit a or the second unit B may be controlled by a program to Output a high/low level, and when the DO Output end of the first unit a outputs a high level, a coil of the first relay K1 is energized to pull the first relay K1 to be closed; when the DO output end of the second unit B outputs a high level, the coil of the second relay K2 is electrified, and the attraction second relay K2 is closed.
The controller of the first unit a or the second unit B may detect a high/low level input from a di (digital input) input terminal. When the relay of the first unit A is closed, the VCC and DI input ends of the controller of the first unit A form a closed loop, and at the moment, the controller of the first unit A can detect a high-level signal; when the relay of the second unit B is engaged, the VCC and DI input terminals of the controller of the second unit B form a closed loop, and at this time, the controller of the second unit B can detect a high level signal.
In summary, the first relay K1 is controlled to be closed by the DO output terminal of the first unit a, and the second unit B can distinguish the time and the maintaining time of the high level signal output by the ADO output terminal of the first unit, and the second unit B is the same.
The first unit A and the second unit B can mutually detect high level signals output by the other side, namely I/O (input/output) signals can be mutually transmitted to detect the time for attracting the relay, so that abnormal control caused by false triggering can be effectively avoided, and the timing sequence of attracting the relay of the first unit A and the second unit B is equivalent to signal confirmation on analog communication, so that the control reliability is improved.
Therefore, according to the technical scheme provided by the embodiment, the first unit A and the second unit B transmit the switching signals through the relay, so that the two units mutually confirm the switching signals, and the shutdown of all the units caused by the unit switching failure is effectively prevented. Compared with the technical scheme of carrying out double-unit switching by transmitting communication signals in the prior art, the technical scheme provided by the embodiment has the advantages of stronger anti-interference capability, higher unit switching success rate and more reliable system.
In specific practice, according to the technical solution provided by this embodiment, the switching signal timing chart shown in fig. 3 may be used to control the switching of the operation states of the first unit and the second unit.
Referring to fig. 7 and 8, the switching process of the unit control system provided in this embodiment includes:
the first stage is as follows:
the first unit A is started, the second unit B is closed, the controller of the first unit A attracts the first relay K1, and a first switching signal (high level signal A1) with the maintaining time length of t1 is generated to indicate that a switching command is sent.
And a second stage:
the second unit B is turned off, the controller of the second unit B activates the second relay K2 to generate a second switching signal (high level signal B1) with a duration of t1, which indicates a switching command in response to the first unit a, and then the second unit B starts to start.
And a third stage:
the first unit a is still in an open state, the controller of the first unit a continues to pull in the first relay K1, and a third switch signal (high level signal a2) with a duration of t1 is generated, which indicates that the second unit B is waiting to start.
When the second unit B detects A2, if the second unit B is normally started, the second relay is attracted, and a fourth switching signal (a high-level signal B2) with the maintaining time length of t2(0< t2< t1) is generated, so that the second unit B is normally started.
When the first unit a detects the high level signal B2 while maintaining the high level signal a2, it indicates that the second unit B has been successfully switched to start, and after the first unit a finishes the high level signal a2, the first unit is turned off.
In the above, referring to fig. 3, the first unit a and the second unit B complete a complete switching control sequence. When the next control sequence comes, the switching process is continuously repeated. The difference is that when the next control sequence comes, the second unit B is switched to the first unit A.
It can be understood that, according to the technical scheme provided by this embodiment, through the multi-turn signal confirmation of the first unit and the second unit, the switching to the second unit is completed before the first unit is turned off, thereby effectively preventing all units from being turned off due to unit switching failure, and having higher unit switching success rate and more reliable system.
EXAMPLE six
A special type air conditioner according to an exemplary embodiment is shown, including:
the unit control system of embodiment two; alternatively, the first and second electrodes may be,
the unit control system of the fourth embodiment.
According to the technical scheme provided by the embodiment, the first unit A and the second unit B of the unit control system transmit the switching signals through the switching elements, so that the two units mutually confirm the switching signals, and the shutdown of all the units caused by the unit switching failure is effectively prevented. Compared with the technical scheme of carrying out double-unit switching by transmitting communication signals in the prior art, the technical scheme provided by the embodiment has the advantages of stronger anti-interference capability, higher unit switching success rate and more reliable system.
It is understood that the same or similar parts in the above embodiments may be mutually referred to, and the same or similar parts in other embodiments may be referred to for the content which is not described in detail in some embodiments.
It should be noted that the terms "first," "second," and the like in the description of the present invention are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Further, in the description of the present invention, the meaning of "a plurality" means at least two unless otherwise specified.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and alternate implementations are included within the scope of the preferred embodiment of the present invention in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present invention.
It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present invention may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (11)
1. A double-unit control method is applied to a first unit and is characterized by comprising the following steps:
detecting the running state of the first unit;
when the running state of the first unit is on and the running state needs to be switched from on to off, outputting a switching signal to the second unit through the first switching element so that the second unit starts to start after detecting the switching signal, and feeding back another switching signal through the second switching element after the second unit is normally started;
after receiving a switching signal fed back by the second unit, closing the first unit;
the first switch element is connected between the output end of the first unit and the input end of the second unit;
the second switching element is connected between the output of the second unit and the input of the first unit.
2. The method of claim 1, wherein outputting the switching signal to the second bank via the first switching element comprises:
when the operation state of the first unit is open and the operation state needs to be switched from open to closed,
outputting a first switching signal to the second unit through the first switching element so that the second unit starts to start after detecting the first switching signal, and feeding back a second switching signal through the second switching element;
after the second switching signal is detected, outputting a third switching signal to the second unit through the first switching element to inform the second unit that the second unit is waiting for the second unit to be started;
and if a fourth switching signal which is fed back by the second unit through the second switching element and is normally started is received in the third switching signal duration, stopping outputting the third switching signal and closing the first unit.
3. The method of claim 2,
the duration of the first switching signal, the duration of the second switching signal and the duration of the third switching signal are different;
the duration of the fourth switching signal is less than the duration of the third switching signal;
alternatively, the first and second electrodes may be,
the duration of the first switching signal, the duration of the second switching signal and the duration of the third switching signal are the same;
the duration of the fourth switching signal is less than the duration of the third switching signal.
4. A unit control system, comprising:
the detection module is used for detecting the running state of the first unit;
the output module is used for outputting a switching signal to the second unit through the first switching element when the running state of the first unit is started and the running state needs to be switched from on to off, so that the second unit starts to be started after the switching signal is detected, and feeds back another switching signal through the second switching element after the second unit is normally started;
the switching module is used for closing the first unit after receiving a switching signal fed back by the second unit;
the first switch element is connected between the output end of the first unit and the input end of the second unit;
the second switching element is connected between the output of the second unit and the input of the first unit.
5. A double-unit control method is applied to a second unit and is characterized by comprising the following steps:
detecting the running state of the second unit and whether the input end connected with the first switch element receives a switch signal sent by the first unit;
when the second unit is in a closed state and receives a switching signal sent by the first unit, starting the second unit, and after the second unit is normally started, feeding back another switching signal through a second switching element so as to close the first unit after the first unit receives the fed-back switching signal;
the first switch element is connected between the output end of the first unit and the input end of the second unit;
the second switching element is connected between the output of the second unit and the input of the first unit.
6. The method of claim 5, wherein feeding back the further switching signal via the second switching element comprises:
starting after detecting a first switching signal which is output by the first switching element and used for informing switching of the first unit, and feeding back a second switching signal to the first unit through the second switching element, so that after detecting the second switching signal, the first unit outputs a third switching signal which is used for informing the second unit of waiting for starting of the second unit through the first switching element;
and after the third switching signal is detected, if the second unit is normally started, feeding a fourth switching signal back to the first unit, so that the first unit stops outputting the third switching signal and closes the first unit after receiving the fourth switching signal in the duration of the third switching signal.
7. The method of claim 6,
the duration of the first switching signal, the duration of the second switching signal and the duration of the third switching signal are different;
the duration of the fourth switching signal is less than the duration of the third switching signal;
alternatively, the first and second electrodes may be,
the duration of the first switching signal, the duration of the second switching signal and the duration of the third switching signal are the same;
the duration of the fourth switching signal is less than the duration of the third switching signal.
8. A unit control system, comprising:
the detection module is used for detecting the running state of the second unit and whether the input end connected with the first switch element receives a switch signal sent by the first unit;
the starting module is used for starting the second unit when the running state of the second unit is closed and the switching signal sent by the first unit is received, and feeding back another switching signal through the second switching element after the second unit is normally started, so that the first unit is closed after the first unit receives the fed-back switching signal;
the first switch element is connected between the output end of the first unit and the input end of the second unit;
the second switching element is connected between the output of the second unit and the input of the first unit.
9. A dual-unit control system, comprising:
the first switch element is connected between the output end of the first unit and the input end of the second unit;
the second switch element is connected between the output end of the second unit and the input end of the first unit;
the unit control system of claim 4, installed in a first unit; and/or the presence of a gas in the gas,
the crew control system of claim 8, installed in a second crew.
10. The system of claim 9,
the first unit and the second unit are special air conditioners.
11. A special air conditioner is characterized by comprising:
the crew control system of claim 4; alternatively, the first and second electrodes may be,
the crew control system of claim 8.
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