CN104833036B - A kind of how main line control machine collision detection method and main line control machine - Google Patents
A kind of how main line control machine collision detection method and main line control machine Download PDFInfo
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- CN104833036B CN104833036B CN201410045047.XA CN201410045047A CN104833036B CN 104833036 B CN104833036 B CN 104833036B CN 201410045047 A CN201410045047 A CN 201410045047A CN 104833036 B CN104833036 B CN 104833036B
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Classifications
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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
-
- 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
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
-
- 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
- F24F11/54—Control or safety arrangements characterised by user interfaces or communication using one central controller connected to several sub-controllers
-
- 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
- F24F11/56—Remote control
- F24F11/58—Remote control using Internet communication
Abstract
The embodiment of the invention discloses a kind of how main line control machine collision detection method and main line control machine, method to include：When AC controling signal is in positive half cycle, main line control machine sends the first data to air-conditioning system bus；When AC controling signal is in negative half period, main line control machine receives the second data of air-conditioning system bus；Main line control machine judges whether the first data are identical with the second data, if so, then continuing to send data, otherwise stops sending data；When main line control machine received data reaches a frame data, judge whether to perform within the cycle for receiving the frame data and stop sending whether the operation of data and the sender of the frame data are main line control machine, determine to detect the event of main line control machine conflict if being to be if judgement, stop sending data.With the presence or absence of the main line control machine more than one in technical scheme energy detecting system described in the embodiment of the present invention, it is avoided that communication caused when there are more main line control machines in air-conditioning system is unreliable.
Description
Technical field
The present invention relates to field of air conditioning, and in particular to a kind of how main line control machine collision detection method and main line control machine.
Background technology
In the line control system of air-conditioning, indoor set controls outdoor unit by connecting line control machine, line control machine and indoor set
Connected mode is divided into three kinds, as shown in Figure 1.
Mode one：The connected mode of line control machine and indoor set plate is one mode of control, as shown in figure 1, a line control machine is only
It is connected with an indoor set, both are connected by three polarity lines.
Mode two：The connected mode of line control machine and indoor set plate is a control multimode, as shown in Fig. 2 a line control machine with
Two indoor sets connect (such as a line control machine can at most connect the interior machine plate of 16 indoor sets), it is main in machine (directly and line traffic control
The connected indoor set of device) it is connected by 3 polarity lines with line control machine, and be connected from interior machine by 2 polarity lines with line control machine
Connect.
Mode three：The connected mode of line control machine and indoor set is two one modes of control, as shown in Figure 3：Two line control machines and one
Platform indoor set is connected, and two line control machines are normally principal and subordinate's line control machine, and (any line control machine may be configured as main line
Control device), set by the dial-up on line control machine, principal and subordinate's line control machine is connected by three polarity lines with indoor set.
If the mode of connection of line control machine and indoor set is two one modes of control described in mode three or one mode of more controls, it is necessary to logical
It is main line control machine to cross toggle switch and set a line control machine.If when dial-up is set mistakenly by two or more line traffic controls
Device is disposed as main line control machine, then main line control machine is more than one in system, can draw when multiple main line control machines send data simultaneously
Play data perturbation and communication failure.
The content of the invention
In view of this, the embodiment of the present invention provides a kind of how main line control machine collision detection method and main line control machine, for detecing
The main line control machine conflict surveyed in air-conditioning system, so that the communication security of air-conditioning system is reliable.
The embodiment of the present invention uses following technical scheme：
In a first aspect, the embodiments of the invention provide a kind of how main line control machine collision detection method, including：
When AC controling signal is in positive half cycle, main line control machine sends the first data to air-conditioning system bus；
When AC controling signal is in negative half period, main line control machine receives the second data of air-conditioning system bus；
Main line control machine judges whether the first data are identical with the second data, if so, then continuing to send data, otherwise stops hair
Send data；
When main line control machine received data reaches a frame data, judge whether held within the cycle for receiving the frame data
Went and stop sending whether the operation of data and the sender of the frame data are main line control machine, and determined to detect if being to be if judgement
The event of main line control machine conflict is measured, stops sending data.
Second aspect, the embodiment of the present invention additionally provide a kind of main line control machine, including control device, dispensing device and reception
Device, the control device are used for：
When AC controling signal is in positive half cycle, the dispensing device is controlled to send the first number to air-conditioning system bus
According to；
When AC controling signal is in negative half period, the reception device is controlled to receive the second number of air-conditioning system bus
According to；
Whether the first data described in real-time judge and second data are identical, if then controlling the dispensing device to continue
Data are sent, otherwise control the dispensing device to stop sending data；
When the reception device received data reaches a frame data, judge receive the frame data cycle in be
No performed stops sending whether the operation of data and the sender of the frame data are main line control machine, true if being to be if judgement
Surely the event of main line control machine conflict is detected, stops sending data.
The advantageous effects of technical scheme that the embodiment of the present invention proposes are：
The technical scheme of the embodiment of the present invention, main line control machine is to air-conditioning during by judging that AC controling signal is in positive half cycle
The first data that system bus is sent, the of main line control machine reception air-conditioning system bus when be in negative half period with AC controling signal
Whether two data are identical, if then continuing to send data, otherwise stop sending data；When main line control machine received data reaches
During one frame data, judge the operation for stopping sending data and the frame data whether were performed within the cycle for receiving the frame data
Sender whether be main line control machine, if judge be to be if determine to detect the event of main line control machine conflict, stop sending number
According to this programme can detect the main line control machine conflict in air-conditioning system, so that the communication security of air-conditioning system is reliable.
Brief description of the drawings
Technical scheme in order to illustrate the embodiments of the present invention more clearly, institute in being described below to the embodiment of the present invention
The accompanying drawing needed to use is briefly described, it should be apparent that, drawings in the following description are only some implementations of the present invention
Example, for those of ordinary skill in the art, on the premise of not paying creative work, it can also be implemented according to the present invention
The content of example and these accompanying drawings obtain other accompanying drawings.
Fig. 1 is one connected mode schematic diagram of control of line control machine and indoor set in the prior art；
Fig. 2 is a multi-link schematic diagram of control of line control machine and indoor set in the prior art；
Fig. 3 is two one connected mode schematic diagrams of control of line control machine and indoor set in the prior art；
Fig. 4 is the how main line control machine collision detection method flow chart described in the specific embodiment of the invention one；
Fig. 5 is that line control machine sends data and receives the schematic diagram of data in the specific embodiment of the invention one；
Fig. 6 is that line control machine sends schematic diagram data to indoor set in the specific embodiment of the invention one；
Fig. 7 is line control machine zero passage circuit diagram in the specific embodiment of the invention three；
Fig. 8 is the how main line control machine collision detection method flow chart described in the specific embodiment of the invention three；
Fig. 9 is the main line control machine structured flowchart described in the specific embodiment of the invention four.
Embodiment
For make present invention solves the technical problem that, the technical scheme that uses and the technique effect that reaches it is clearer, below
The technical scheme of the embodiment of the present invention will be described in further detail with reference to accompanying drawing, it is clear that described embodiment is only
It is part of the embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, those skilled in the art exist
The every other embodiment obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
Further illustrate technical scheme below in conjunction with the accompanying drawings and by embodiment.
Embodiment one
Fig. 4 is the how main line control machine collision detection method flow chart described in the present embodiment, and the present embodiment purpose is to detect
With the presence or absence of the main line control machine more than one in air-conditioning system or air-conditioner set, so as to avoid having in air-conditioning system or air-conditioner set
The problems such as caused communication is unreliable during more main line control machines, for example, for when dial-up is set mistakenly by two or two
More than line control machine be disposed as main line control machine in the case of detecting, being applicable to air-conditioning or air-conditioner set includes at least two
The situation of the main line control machine of platform, at least two main line control machines are connected to each other by control circuit, and are connected to air-conditioning or air-conditioning
Unit, the present embodiment methods described can control device by being served as theme in air-conditioning system or air-conditioner set by setting（Such as pass through dial-up
Mode sets control device of serving as theme）Each main line control machine in control device perform, as shown in figure 4, more described in the present embodiment
Main line control machine collision detection method includes：
S401, when AC controling signal is in positive half cycle, main line control machine to air-conditioning system bus send the first data.
If main line control machine has data frame to be sent, the control device of the main line control machine controls the transmission of the main line control machine
Device sends the data frame to be sent to air-conditioning system bus when AC controling signal is in positive half cycle, specifically, from
The start bit of the data frame starts, and is sent toward backward shift.
S402, when AC controling signal is in negative half period, main line control machine receives the second data of air-conditioning system bus.
The control device of main line control machine controls the reception device of the main line control machine to be in negative in AC controling signal in real time
Data are received during half cycle.
S403, main line control machine judge whether the first data are identical with the second data, if so, then continuing to send data, otherwise
Stop sending data.
The present embodiment requires the equal length of first data and second data, and specific length can be to preset
Preset length, a preferably bit.
S404, when main line control machine received data reaches a frame data, judge receive the frame data cycle in
Whether performed and stop sending whether the operation of data and the sender of the frame data are main line control machine, if judgement is to be
It is determined that detecting the event of main line control machine conflict, stop sending data.
When main line control machine received data reaches a frame data, stop if being performed within the cycle for receiving the frame data
Only send the operation of data, then it is not that the main line control machine oneself is sent in air-conditioning system bus to show the frame data, now,
If judging the sender of the frame data for main line control machine, illustrate in the air-conditioning system in addition to the main line control machine, also to exist
Other main line control machine.
Fig. 5 is in embodiment, and line control machine sends data and receives the schematic diagram of data, as shown in figure 5, A, B are that low pressure is complete
Ripple AC signal, C are data terminal.A is line control machine dispensing device in Fig. 5（Worked in the positive half cycle of AC signal）, 1 is sent every time
Bit, the d of right half part is indoor set dispensing device（Worked in the negative half period of AC signal）.B is the reception of line control machine in Fig. 5
Device（Worked in the negative half period of AC signal）, c is indoor set reception device in Fig. 5（Worked in the positive half cycle of AC signal）.
Fig. 6 is that line control machine sends schematic diagram data to indoor set in the present embodiment, and line control machine sends data, room to indoor set
Interior machine delay half cycle tracking lens picture, 1 bit is sent every time until a frame data are sent completely, as shown in fig. 6, the data sent are
1011。
Technical scheme described in the present embodiment, it is in by the control device real-time judge AC controling signal of main line control machine
Main line control machine sends the first data, main line control machine when being in negative half period with AC controling signal to air-conditioning system bus during positive half cycle
Whether identical receive the second data of air-conditioning system bus, if then continuing to send data, otherwise stop sending data；Work as main line
When control device received data reaches a frame data, judge that stopping whether being performed within the cycle for receiving the frame data sends number
According to operation and the senders of the frame data whether be main line control machine, if judge be to be if determine to detect main line control machine punching
Prominent event, stop sending data whether there is the main line control machine more than one in detecting system, be avoided that in air-conditioning system
Caused communication is unreliable when having a more main line control machines.
Embodiment two
Compared with embodiment one, whether the present embodiment is on the basis of embodiment one, further to being deposited in air-conditioning system
Duplicate acknowledgment is carried out in the judgement of the main line control machine more than one, causes erroneous judgement to avoid factor data from sending reception mistake,
Specially also include after main line control machine conflict in described detect：
Main line control machine will be used to identify that the collision count of how main line control machine conflict number adds one, if the collision count reaches
Predetermined threshold value, then main line control machine judge that the air-conditioning system includes at least two main line control machines, to air-conditioning system bus send
Warning information.
Further, preferably, first data are mutually spent with second data length, length is equal to default length
Degree.
Preferably, the preset length is a bit.
Further, predetermined threshold value described in embodiment one is specially 3 by the present embodiment.It can shut out to a certain extent
The situation of exhausted erroneous judgement, turn avoid influences to detect efficiency because repeated authentication number is excessive.
To sum up, the present embodiment is compared with the technical scheme of embodiment one, further to whether there is in air-conditioning system
The judgement of main line control machine more than one carries out duplicate acknowledgment, can prevent the situation of erroneous judgement to a certain extent, avoid again
Influences detecting efficiency because repeated authentication number is excessive.
Embodiment three
Fig. 7 is line control machine zero passage circuit diagram in the present embodiment.Line control machine is exchanged logical with air-conditioning internal machine plate by three cores
Bus connection is interrogated, A, B are the full-wave AC signal of transformer output, and C is data terminal.Communication agreement provides that line control machine exists
Exchange positive half cycle to send, interior machine plate is sent in negative half period.As shown in fig. 7, D401, D402, C401, R409, R402, C402,
Q402, R410, R411 form zero cross detection circuit.R401, Q401, R408, U401, R412, C405, R404, R405 are data
Transtation mission circuit.R406, R407, U402, R408, C404 are data receiver circuit.Line control machine is only exchanging positive half cycle transmission data,
When it is 0 that line control machine, which sends data, the cut-off of MCU output ends=0, Q401, U401 luminous end no currents, controllable silicon cut-off, C lines electricity
Pressure about 0.When it is 1 to send data, the conducting of MCU output ends=1, Q401, U401 controlled silicon conductings, C line voltages by R404,
R405 is equal to A line voltages.Interior machine plate is only sent in exchange negative half period, and line control machine is reception state, and now B line voltages are higher than A lines
Voltage.When interior machine data are 0, C line voltages cause U402 luminous end no currents, controllable silicon cut-off, MCU inputs equal to 0, D401
Dragged down by R408.When interior machine data are 1, C line voltages are equal to B line voltages, pass through R406, D401 to A lines so that U402 is sent out
Light end produces electric current, U402 controlled silicon conductings, and MCU inputs are pulled to high level.
Analysis finds out that this communication mechanism can realize arbitration mechanism more than, and data 1 can be preferentially sent on C lines.Line
Control device is confidential in No. 0 to follow identical data in negative half period after exchanging positive half cycle and having sent data., can using this characteristic
With how main line control machine Auto-Sensing.
Main line control machine after positive half cycle sends data, all reads bus data in negative half period every time.If the data read
Data equal to transmission then continue to send, and preserve the data received, in case the judgement of subsequent data frame；If unequal,
Stop sending immediately, and keep monitoring the data of negative half period.After a frame is harvested, judge whether the frame data are main line control machine hair
Send, the data frame if not being main line control machine, this 300 milliseconds of follow-up supervention of main line control machine delay is sent；As found, the frame data are one
Whether individual main line control machine data frame stops sending data, it is necessary to determine whether to perform within the cycle for receiving the frame data
Operation, if then illustrating may also have another main line control machine in system, it is determined that the main line control machine is detected in air-conditioning system
The event of main line control machine conflict be present, the main line control machine stops sending, and keeps monitoring.
If can continue repeatedly to receive main line control machine data frame, and stopping was performed within the cycle for receiving the frame data
The operation of data is sent, then confirms that the air-conditioning system includes at least two main line control machines, this main line control machine stops all hairs
See off to send warning information to air-conditioning system bus（Such as in interface display failure code）.
As do not received main line control machine data frame again in the follow-up long duration, then data frame that may be just now is to be disturbed out
Existing error in data.This line control machine recovers normal communication, and keeps collision detection mechanism.
Main line control machine is to whether there is two or more main line control machines, its frame control in air-conditioning system or air-conditioner set
Process processed is as follows：
Line control machine transmits, and line control machine often sends a bit, and indoor set delays half period tracking lens picture, until completing whole
Frame is sent；
Indoor set transmits, and line control machine does not track；
After line control machine sends a frame data, switch to receive, the most long idle stand-by period is 300ms, sends data again；
Initiate to write in reply after indoor set receives a frame data, in 50ms.
Line control machine sends data to indoor set, indoor set delay half cycle tracking lens picture, sends 1 bit every time until a frame number
According to being sent completely.
After line control machine sends a frame data to indoor set, data are sent to line control machine in indoor set 50ms, line control machine is always
In reception state, until a frame data are all sent to line control machine by indoor set.
Fig. 8 is the how main line control machine collision detection method flow chart described in the present embodiment, as shown in figure 8, the present embodiment institute
The how main line control machine collision detection method stated includes：
Whether S801, AC controling signal are in positive half cycle, if then performing step S802, otherwise perform step S807.
S802, whether there is transmission demand, if then performing step S803, otherwise perform step S821.
When main line control machine received data reaches a frame data, main line control machine itself（This main line control machine）Judge whether
There are data to send demand, if there is transmission demand, when the air-conditioning system bus most long idle stand-by period is 300ms, carry out new one
The data of wheel are sent.
S803, data displacement is sent, perform step S804.
For the present embodiment so that main line control machine dispensing device carries out step-by-step transmission to data as an example, this step is when main line control machine will
When sending data, data to be sent are moved one and are transmitted.
S804, send whether data bit is equal to 1, if then performing step S805, otherwise perform step S806.
After sending data, transmitted data need to be backed up in case being carried out with the main line control machine received data position
Compare.
S805, backup send data=1, perform step S821.
S806, backup send data=0, perform step S821.
S807, read whether data are equal to 1, if then performing step S808, otherwise perform step S809.
S808, backup send whether data are equal to 1, if then performing step S810, otherwise perform step S811.
S809, backup send whether data are equal to 0, if then performing step S810, otherwise perform step S811.
S810, allow to continue to send, perform step S812.
S811, stop sending, perform step S812.
S812, reception data are moved into, perform step S813.
S813, a frame data whether are received, if then performing step S814, otherwise performed step S819.
This step judges whether received data reaches a frame data for main line control machine.
S814, whether stopping once being sent, if then performing step S815, otherwise perform step S820.
This step is used for main line control machine and judges whether to perform the operation for stopping sending data, if once performing stopping hair
The operation of data is sent, then illustrates that a received frame data are not the data frames transmitted by the main line control machine oneself, otherwise illustrates
The frame data received are the data frames transmitted by the main line control machine oneself, thus can not be to whether having other in air-conditioning system
Main line control machine detected.
Whether S815, sender are main line control machine, if then performing step S816, otherwise perform step S820.
This step is used to judge whether the sender of received frame data is main line control machine.
S816, stop sending data, collision count adds 1, performs step S817.
The collision count is used for the conflict number for identifying how main line control machine.
Whether S817, collision count are more than 3, if then performing step S818, otherwise perform step S821.
S818, stop sending data, send warning information, perform step S821.
S819, data are continued to, perform step S821.
S820, collision count are not added with 1；Allow to send data, 300 milliseconds of forward delay interval, perform step S821.
S821, interrupt return.
Compared with embodiment one, the present embodiment passes through main line control so that the first data and the second data are a bit as an example
When the control device real-time judge AC controling signal of device is in positive half cycle main line control machine control device control dispensing device to
Air-conditioning system bus sends the first data of a bit, the control device of main line control machine when being in negative half period with AC controling signal
Control the second data of a bit of reception device reception air-conditioning system bus whether equal, if then controlling dispensing device to continue
Data are sent, otherwise control the dispensing device to stop sending data；When main line control machine received data reaches a frame data
When, the control device of main line control machine judge whether to perform within the cycle for receiving the frame data operation that stops sending data with
Determine to detect the event of main line control machine conflict and whether the sender of the frame data is main line control machine, if being to be if judgement,
Stop sending data, whether there is the main line control machine more than one in detecting system, can further improve detecting efficiency.
Example IV
Fig. 9 is the main line control machine structured flowchart described in the present embodiment, as shown in figure 9, present embodiment discloses a kind of main line
Device is controlled, the main line control machine includes control device 901, dispensing device 902 and reception device 903, and the control device 901 is used
In：
When AC controling signal is in positive half cycle, control dispensing device 902 sends the first data to air-conditioning system bus；
When AC controling signal is in negative half period, control reception device 903 receives the second data of air-conditioning system bus；
Whether the data of real-time judge first are identical with the second data, if then control dispensing device 902 continues to send data,
Otherwise the dispensing device 902 is controlled to stop sending data；
When the received data of reception device 903 reaches a frame data, judge receive the frame data cycle in be
It is no to perform the operation for stopping sending data, if whether the sender for then judging the frame data is main line control machine, if then detecing
Main line control machine conflict is measured, stops sending data.
Further, the control device 901 is additionally operable to：Also include after main line control machine conflict is detected：
It will be used to identify that the collision count of how main line control machine conflict number adds one；
If the collision count reaches predetermined threshold value, judge that the air-conditioning system includes at least two main line control machines,
Warning information is sent to air-conditioning system bus.
Further, first data are mutually spent with second data length, and length is equal to preset length.
Further, the preset length is a bit.
Further, the predetermined threshold value is 3.
Main line control machine described in the present embodiment, including control device 901, dispensing device 902 and reception device 903, it is described
When control device 901 is in positive half cycle for real-time judge AC controling signal, dispensing device 902 is controlled to air-conditioning system bus
The first data are sent, when being in negative half period with AC controling signal, control reception device 903 receives the second of air-conditioning system bus
Whether data are identical, if then control dispensing device 902 continues to send data, otherwise control the dispensing device 902 to stop hair
Send data；When the received data of reception device 903 reaches a frame data, judge receive the frame data cycle in whether
The operation for stopping sending data was performed, if whether the sender for then judging the frame data is main line control machine, if then detecting
To main line control machine conflict, stop sending data, whether there is the main line control machine more than one in detecting system, be avoided that air-conditioning
Caused communication is unreliable when having more main line control machines in system.
Above example provide technical scheme in all or part of content can be realized by software programming, its software
Program storage is in the storage medium that can be read, and storage medium is for example：Hard disk, CD or floppy disk in computer.
Pay attention to, above are only presently preferred embodiments of the present invention and institute's application technology principle.It will be appreciated by those skilled in the art that
The invention is not restricted to specific embodiment described here, can carry out for a person skilled in the art various obvious changes,
Readjust and substitute without departing from protection scope of the present invention.Therefore, although being carried out by above example to the present invention
It is described in further detail, but the present invention is not limited only to above example, without departing from the inventive concept, also
Other more equivalent embodiments can be included, and the scope of the present invention is determined by scope of the appended claims.
Claims (10)
- A kind of 1. how main line control machine collision detection method, it is characterised in that including：When AC controling signal is in positive half cycle, main line control machine sends the first data to air-conditioning system bus；When AC controling signal is in negative half period, main line control machine receives the second data of air-conditioning system bus；Main line control machine judges whether the first data are identical with the second data, if so, then continuing to send data, otherwise stops sending number According to；When main line control machine received data reaches a frame data, judge whether performed within the cycle for receiving the frame data Stop sending whether the operation of data and the sender of the frame data are main line control machine, determine to detect if being to be if judgement The event of main line control machine conflict, stop sending data.
- 2. how main line control machine collision detection method as claimed in claim 1, it is characterised in that described to detect main line control machine punching Also include after prominent step：It will be used to identify that the collision count of how main line control machine conflict number adds one；If the collision count reaches predetermined threshold value, main line control machine judges that the air-conditioning system includes at least two main line controls Device, warning information is sent to air-conditioning system bus.
- 3. how main line control machine collision detection method as claimed in claim 1 or 2, it is characterised in that first data and institute It is identical to state the length of the second data, the length is equal to preset length.
- 4. how main line control machine collision detection method as claimed in claim 3, it is characterised in that the preset length is a ratio It is special.
- 5. how main line control machine collision detection method as claimed in claim 2, it is characterised in that the predetermined threshold value is 3.
- 6. a kind of main line control machine, it is characterised in that including control device, dispensing device and reception device, the control device is used In：When AC controling signal is in positive half cycle, the dispensing device is controlled to send the first data to air-conditioning system bus；When AC controling signal is in negative half period, the reception device is controlled to receive the second data of air-conditioning system bus；Whether the first data described in real-time judge and second data are identical, if then controlling the dispensing device to continue to send Data, the dispensing device is otherwise controlled to stop sending data；When the reception device received data reaches a frame data, judge whether held within the cycle for receiving the frame data Went and stop sending whether the operation of data and the sender of the frame data are main line control machine, and determined to detect if being to be if judgement The event of main line control machine conflict is measured, stops sending data.
- 7. main line control machine as claimed in claim 6, it is characterised in that the control device is additionally operable to：Detecting main line control Also include after device conflict：It will be used to identify that the collision count of how main line control machine conflict number adds one；If the collision count reaches predetermined threshold value, judge that the air-conditioning system includes at least two main line control machines, to sky Adjusting system bus sends warning information.
- 8. main line control machine as claimed in claims 6 or 7, it is characterised in that first data and second data length Identical, the length is equal to preset length.
- 9. main line control machine as claimed in claim 8, it is characterised in that the preset length is a bit.
- 10. main line control machine as claimed in claim 7, it is characterised in that the predetermined threshold value is 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410045047.XA CN104833036B (en) | 2014-02-07 | 2014-02-07 | A kind of how main line control machine collision detection method and main line control machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410045047.XA CN104833036B (en) | 2014-02-07 | 2014-02-07 | A kind of how main line control machine collision detection method and main line control machine |
Publications (2)
| Publication Number | Publication Date |
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| CN104833036A CN104833036A (en) | 2015-08-12 |
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| CN109210733B (en) * | 2018-08-30 | 2021-02-23 | 青岛海信日立空调系统有限公司 | Drive-by-wire ware and air conditioner |
| CN112556131B (en) * | 2020-12-15 | 2022-03-25 | 佛山市顺德区美的电子科技有限公司 | Switching control panel for air conditioning system, air conditioning system and self-adaptive control method |
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