CN109164758A - Intelligent numerical control machine tool control method and system based on Internet of Things - Google Patents
Intelligent numerical control machine tool control method and system based on Internet of Things Download PDFInfo
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- CN109164758A CN109164758A CN201811068773.8A CN201811068773A CN109164758A CN 109164758 A CN109164758 A CN 109164758A CN 201811068773 A CN201811068773 A CN 201811068773A CN 109164758 A CN109164758 A CN 109164758A
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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
- G05B19/18—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form
- G05B19/406—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by monitoring or safety
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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
- G05B2219/30—Nc systems
- G05B2219/31—From computer integrated manufacturing till monitoring
- G05B2219/31105—Remote control of network controller
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Abstract
The intelligent numerical control machine tool control method based on Internet of Things that the invention discloses a kind of includes the following steps: to generate multiple control information at multiple remote control terminals；By control centre's collection system load information；It can be used in transmitting the number of resources of control information generated in the unit of account time；Receive control information size message transmitted by multiple remote control terminals；Number of resources and control information size based on control information, generate the contention transmission opportunities that do not conflict in the unit time；Predict the unit time in institute it is received competition transmit number；Infer collision probability；If collision probability be greater than threshold value, by control centre adjustment the unit time in institute it is received competition transmission number, and defining ideal competition transmit number；Calculate the number for the remote control terminal for being currently able to be transmitted；Allow to send information to G randomly selected remote control terminal transmissions；Control information is sent to control centre from receiving the remote control terminal for allowing to send information；And control information is forwarded to numerically-controlled machine tool.
Description
Technical field
The present invention relates to intelligent machine manufacturing technology fields, especially with regard to a kind of intelligent numerical control machine based on Internet of Things
Bed control method and system.
Background technique
Machine tool equipment is the machine-tool of equipment manufacture, is the important of the national economic development especially Industrial Economic Development
Basis.On the one hand, as manufacturing industry rapidly develops, various machining tool equipments also start constantly progress upgrading, from common in-vehicle
Bed, numerically-controlled machine tool to machining center etc..Correspondingly, also huge variation: selection, the processing of such as lathe is occurring for processing technology
The parameter of the selection of mode, the selection of processing technology, the determination of tool holder parameter and lathe in processing operational process is really
It is fixed etc., it requires enterprise and a large amount of resource is spent to be designed and manage；On the other hand, being growing more intense with market competition
And the fusion application of emerging information technology and manufacturing technology, global machine tool equipment industry is just gradually to digitlization, instrumentation, net
The directions such as network, serviceization and intelligence are developed.And the increasingly increase of human cost, the gradually disappearance of resource bonus, Yi Jiquan
Ball manufacturing industry chain is constantly shifted to South Asia, so that China's machine tool equipment industry is faced with biggish downlink pressure under new trend
Power.How all kinds of isomery machine tool equipment resource intensive, networking, serviceization control and collaboration are realized in wide scope altogether
It enjoys, promotes its trans-regional business collaboration ability and overall competitiveness, the transition and upgrade of the entire machine tool equipment industrial chain of boosting,
Have become the development problem of current China's machine tool equipment industry.
The information disclosed in the background technology section is intended only to increase the understanding to general background of the invention, without answering
When being considered as recognizing or imply that the information constitutes the prior art already known to those of ordinary skill in the art in any form.
Summary of the invention
The purpose of the present invention is to provide a kind of intelligent numerical control machine tool control method and system based on Internet of Things, can
The shortcomings that overcoming the prior art.
To achieve the above object, the intelligent numerical control machine tool control method based on Internet of Things that the present invention provides a kind of, including
Following steps:
Multiple control information are generated at multiple remote control terminals；
By control centre collection system load information A；
System load information is based on by control centre, can be used in transmitting control information generated in the unit of account time
Number of resources B；
Control information size message transmitted by multiple remote control terminals is received as control centre, wherein control information
Size message instruction control information size C；
By control centre based on the number of resources and control information size that are used for transmission control information generated, generate single
Do not conflict contention transmission opportunities D in the time of position；
By control centre prediction the unit time in institute it is received competition transmit number E；
Do not conflict in unit time contention transmission opportunities D and the received competition of institute in the unit time are based on by control centre
The number E of transmission infers collision probability F；
If collision probability is greater than threshold value, by a of the received competition transmission of institute in control centre's adjustment unit time
Number is so that collision probability is less than threshold value, and defines so that collision probability was less than in the unit time of threshold value being adjusted
Received competition transmission number be ideal competition transmission number E2；
Number E2 by control centre based on ideal competition transmission, calculates the remote control terminal for being currently able to be transmitted
Number G；
Allow to send information from control centre to G randomly selected remote control terminal transmissions；
Control information is sent to control centre from receiving the remote control terminal for allowing to send information；And
Numerically-controlled machine tool is forwarded to by information is controlled by control centre.
In a preferred embodiment, wherein system load information is the occupied ratio of system bandwidth；
It is big based on the number of resources and control information for being used for transmission control information generated by control centre by following formula
It is small, generate the contention transmission opportunities D that do not conflict in the unit time:
D=1000 × (B/C)
Wherein, the unit that can be used in transmitting the number of resources B of control information generated in the unit time is bit, control
The unit of information size C is bit.
In a preferred embodiment, it is based on not conflicting in the unit time by control centre by following formula and competes conveyer
Can in D and unit time the received competition transmission of institute number E, deduction collision probability F:
In a preferred embodiment, by control centre prediction the unit time in institute it is received competition transmit number E
Specifically:
In the unit time in predetermined amount of time before determining current time by control centre received transmission
Number；
By in the unit time in the predetermined amount of time before current time received transmission number and prearranged multiple
It is multiplied, to obtain in the unit time number E that the received competition of institute is transmitted；
Wherein, the range of prearranged multiple is 1.3-1.5.
In a preferred embodiment, by control centre adjustment the unit time in institute it is received competition transmit number with
So that collision probability includes the following steps: less than threshold value
Do not conflicted contention transmission opportunities D based on threshold value and in the unit time, and counter to push away institute in the unit time received competing
Strive the maximum value of the number of transmission；
Determine the Transmission Time Interval of each remote control terminal；
Based in the unit time being back-calculated to obtain the maximum value of number of received competition transmission and identified every
The Transmission Time Interval of a remote control terminal, the number for showing that the received competition of institute is transmitted in the unit time being adjusted are
The number E2 of ideal competition transmission.
The intelligent numerical control machine tool control system based on Internet of Things that the present invention also provides a kind of, it is characterised in that: be based on object
The intelligent numerical control machine tool control system of networking includes:
Multiple remote terminals, each of plurality of remote terminal remote terminal are configurable to generate multiple control letters
Breath；With
Control centre, control centre and multiple remote terminals communicate to connect, and control centre and CNC Machine Tools Communication connect
It connects；
Control centre is configured as:
Collection system load information A；
Based on system load information, it can be used in the number of resources B for transmitting control information generated in the unit of account time；
Receive control information size message transmitted by multiple remote control terminals, wherein control information size message refers to
Show control information size C；
Based on the number of resources and control information size for being used for transmission control information generated, generate in the unit time not
Conflict contention transmission opportunities D；
Predict the unit time in institute it is received competition transmit number E；
Based on do not conflict in the unit time contention transmission opportunities D and in the unit time it is received competition transmission number
E infers collision probability F；
If collision probability is greater than threshold value, the number of the received competition transmission of institute in the unit time is adjusted so that rushing
Prominent probability is less than threshold value, and defines so that collision probability is received competing less than institute in the unit time of threshold value being adjusted
The number for striving transmission is the number E2 of ideal competition transmission；
Based on the number E2 of ideal competition transmission, the number G for the remote control terminal for being currently able to be transmitted is calculated；
Allow to send information to G randomly selected remote control terminal transmissions；
Control information is sent to control centre from receiving the remote control terminal for allowing to send information；
Control information is forwarded to numerically-controlled machine tool.
In a preferred embodiment, wherein system load information is the occupied ratio of system bandwidth；
It is big based on the number of resources and control information for being used for transmission control information generated by control centre by following formula
It is small, generate the contention transmission opportunities D that do not conflict in the unit time:
D=1000 × (B/C)
Wherein, the unit that can be used in transmitting the number of resources B of control information generated in the unit time is bit, control
The unit of information size C is bit.
In a preferred embodiment, it is based on not conflicting in the unit time by control centre by following formula and competes conveyer
Can in D and unit time the received competition transmission of institute number E, deduction collision probability F:
In a preferred embodiment, by control centre prediction the unit time in institute it is received competition transmit number E
Specifically:
In the unit time in predetermined amount of time before determining current time by control centre received transmission
Number；
By in the unit time in the predetermined amount of time before current time received transmission number and prearranged multiple
It is multiplied, to obtain in the unit time number E that the received competition of institute is transmitted；
Wherein, the range of prearranged multiple is 1.3-1.5.
In a preferred embodiment, by control centre adjustment the unit time in institute it is received competition transmit number with
So that collision probability includes the following steps: less than threshold value
Do not conflicted contention transmission opportunities D based on threshold value and in the unit time, and counter to push away institute in the unit time received competing
Strive the maximum value of the number of transmission；
Determine the Transmission Time Interval of each remote control terminal；
Based in the unit time being back-calculated to obtain the maximum value of number of received competition transmission and identified every
The Transmission Time Interval of a remote control terminal, the number for showing that the received competition of institute is transmitted in the unit time being adjusted are
The number E2 of ideal competition transmission.
Compared with prior art, the intelligent numerical control machine tool control method and system of the invention based on Internet of Things has as follows
Advantage: China currently promotes industry 4.0 and made in China 2025 to plan.In the process, how to realize that factory is automatic
Metaplasia produces and intelligence production is still great technical problem.Household technology of Internet of things starts to popularize gradually at present, uses
Family can by a variety of electric appliances in wireless network control family, can in real-time monitoring man electric appliance state etc..But work
The transmission of industry grade Internet of Things and the transmission of household grade Internet of Things have different technical requirements, directly by household technology of Internet of things " transplanting "
It often can not achieve industrial intelligent target into factory.One important indicator of technical grade Internet of Things transmission is how to protect
Transmission success rate is demonstrate,proved, in order to guarantee transmission success rate, the present invention provides a kind of prediction transmission success probability, and are based on institute
The transmission success rate of prediction, to limit transmission terminal number, thus the side for preventing multiple terminal simultaneous transmissions from channel being caused to block
Method.Due to the particularity of Industry Control, need to guarantee the low delay and success rate of transmission, and method of the invention is due to being capable of thing
First predict transmission success rate, institute with the inventive method can by reduction transmission terminal number method, fundamentally avoid
Conflict the generation transmitted, and fundamentally reduces transmission delay and improves the success rate of transmission, realizes the Internet of Things of technical grade
Network Communication.
Detailed description of the invention
Fig. 1 is the intelligent numerical control machine tool control method flow chart based on Internet of Things according to an embodiment of the present invention.
Fig. 2 is the intelligent numerical control machine tool control system schematic diagram based on Internet of Things according to an embodiment of the present invention.
Specific embodiment
With reference to the accompanying drawing, specific embodiments of the present invention will be described in detail, it is to be understood that guarantor of the invention
Shield range is not limited by the specific implementation.
Unless otherwise explicitly stated, otherwise in entire disclosure and claims, term " includes " or its change
Changing such as "comprising" or " including " etc. will be understood to comprise stated element or component, and not exclude other members
Part or other component parts.
Fig. 1 is the intelligent numerical control machine tool control method flow chart based on Internet of Things according to an embodiment of the present invention.It should
Intelligent machine tool control method based on Internet of Things includes the following steps:
Step 101: multiple control information are generated at multiple remote control terminals；
Step 102: by control centre collection system load information A；
Step 103: system load information being based on by control centre, can be used in transmitting in the unit of account time generated
Control the number of resources B of information；
Step 104: control information size message transmitted by multiple remote control terminals is received as control centre, wherein
Control information size message instruction control information size C；
Step 105: big based on the number of resources and control information for being used for transmission control information generated by control centre
It is small, generate the contention transmission opportunities D that do not conflict in the unit time；
Step 106: by control centre prediction the unit time in institute it is received competition transmit number E；
Step 107: be based on not conflicting in the unit time by control centre contention transmission opportunities D and is connect in the unit time
The number E of the competition transmission of receipts, infers collision probability F；
Step 108: if collision probability is greater than threshold value, by the received competition of institute in control centre's adjustment unit time
The number of transmission is so that collision probability is less than threshold value, and defines so that collision probability is less than the list of threshold value being adjusted
The number of the received competition transmission of institute is the number E2 that ideal competition is transmitted in the time of position；
Step 109: the number E2 by control centre based on ideal competition transmission, reckoning is currently able to be transmitted long-range
The number G of controlling terminal；
Step 110: allowing to send information from control centre to G randomly selected remote control terminal transmissions；
Step 111: sending control information to control centre from receiving the remote control terminal for allowing to send information；And
Step 112: being forwarded to numerically-controlled machine tool for information is controlled by control centre.
In a preferred embodiment, wherein system load information is the occupied ratio of system bandwidth；
It is big based on the number of resources and control information for being used for transmission control information generated by control centre by following formula
It is small, generate the contention transmission opportunities D that do not conflict in the unit time:
D=1000 × (B/C)
Wherein, the unit that can be used in transmitting the number of resources B of control information generated in the unit time is bit, control
The unit of information size C is bit.
In a preferred embodiment, it is based on not conflicting in the unit time by control centre by following formula and competes conveyer
Can in D and unit time the received competition transmission of institute number E, deduction collision probability F:
In a preferred embodiment, by control centre prediction the unit time in institute it is received competition transmit number E
Specifically:
In the unit time in predetermined amount of time before determining current time by control centre received transmission
Number；
By in the unit time in the predetermined amount of time before current time received transmission number and prearranged multiple
It is multiplied, to obtain in the unit time number E that the received competition of institute is transmitted；
Wherein, the range of prearranged multiple is 1.3-1.5.
In a preferred embodiment, by control centre adjustment the unit time in institute it is received competition transmit number with
So that collision probability includes the following steps: less than threshold value
Do not conflicted contention transmission opportunities D based on threshold value and in the unit time, and counter to push away institute in the unit time received competing
Strive the maximum value of the number of transmission；
Determine the Transmission Time Interval of each remote control terminal；
Based in the unit time being back-calculated to obtain the maximum value of number of received competition transmission and identified every
The Transmission Time Interval of a remote control terminal, the number for showing that the received competition of institute is transmitted in the unit time being adjusted are
The number E2 of ideal competition transmission.
As shown in Fig. 2, the present invention also provides a kind of intelligent numerical control machine tool control system based on Internet of Things, comprising: more
A remote terminal (201a-201x is identified as in Fig. 2), each of plurality of remote terminal remote terminal are configured as
Generate multiple control information；With control centre 203, control centre and multiple remote terminals are communicated to connect, and control centre with
Numerically-controlled machine tool (202a-202x is identified as in Fig. 2) communication connection.
Wherein, control centre 203 is configured as: collection system load information A；Based on system load information, unit of account
It can be used in transmitting the number of resources B of control information generated in time；Receive control transmitted by multiple remote control terminals
Information size message, wherein control information size message instruction control information size C；Based on being used for transmission control generated
The number of resources and control information size of information, generate the contention transmission opportunities D that do not conflict in the unit time；It predicts in the unit time
It is received competition transmission number E；It contention transmission opportunities D and is received in the unit time based on not conflicting in the unit time
Competition transmission number E, infer collision probability F；If collision probability is greater than threshold value, adjusts and received in the unit time
Competition transmission number so that collision probability be less than threshold value, and define so that collision probability be less than threshold value through toning
The number of the received competition transmission of institute is the number E2 that ideal competition is transmitted in whole unit time；Based on ideal competition transmission
Number E2 calculates the number G for the remote control terminal for being currently able to be transmitted；To G randomly selected remote control terminals
Transmission allows to send information；Control information is sent to control centre from receiving the remote control terminal for allowing to send information；With
And control information is forwarded to numerically-controlled machine tool.
In a preferred embodiment, wherein system load information is the occupied ratio of system bandwidth；
It is big based on the number of resources and control information for being used for transmission control information generated by control centre by following formula
It is small, generate the contention transmission opportunities D that do not conflict in the unit time:
D=1000 × (B/C)
Wherein, the unit that can be used in transmitting the number of resources B of control information generated in the unit time is bit, control
The unit of information size C is bit.
In a preferred embodiment, it is based on not conflicting in the unit time by control centre by following formula and competes conveyer
Can in D and unit time the received competition transmission of institute number E, deduction collision probability F:
In a preferred embodiment, by control centre prediction the unit time in institute it is received competition transmit number E
Specifically:
In the unit time in predetermined amount of time before determining current time by control centre received transmission
Number；
By in the unit time in the predetermined amount of time before current time received transmission number and prearranged multiple
It is multiplied, to obtain in the unit time number E that the received competition of institute is transmitted；
Wherein, the range of prearranged multiple is 1.3-1.5.
In a preferred embodiment, by control centre adjustment the unit time in institute it is received competition transmit number with
So that collision probability includes the following steps: less than threshold value
Do not conflicted contention transmission opportunities D based on threshold value and in the unit time, and counter to push away institute in the unit time received competing
Strive the maximum value of the number of transmission；
Determine the Transmission Time Interval of each remote control terminal；
Based in the unit time being back-calculated to obtain the maximum value of number of received competition transmission and identified every
The Transmission Time Interval of a remote control terminal, the number for showing that the received competition of institute is transmitted in the unit time being adjusted are
The number E2 of ideal competition transmission.
It should be noted that the method in the embodiment of the present invention can be realized by the device with processor, in the device
It further include being stored with the instruction (software) programmed according to the method for the present invention, when executing the software by processor, the device energy
Enough realize method of the invention.Programmed method is method well known in the art, and how to program not is in emphasis of the invention
Hold, in order to enable specification is succinct, the present invention does not introduce programming details.Processor may be a kind of IC chip, have
The processing capacity of signal.During realization, each step of the above method can pass through the integration logic of the hardware in processor
The instruction of circuit or software form is completed.These instructions can cooperate realization and control by processor therein, be used for
Execute the method that the embodiment of the present invention discloses.Above-mentioned processor can also be general processor, digital signal processor
(Digital Signal Processing, DSP), specific integrated circuit (application specific integrated
Circuit), ready-made programmable gate array (FieldProgrammable Gate Array, FPGA) or other programmable patrol
Collect device, discrete gate or transistor logic, discrete hardware components.
Wherein, above-mentioned general processor can be microprocessor or the processor is also possible to any conventional processing
Device, decoder etc..The step of method in conjunction with disclosed in the embodiment of the present invention, can be embodied directly in hardware processor and execute
At, or in processor hardware and software module combination execute completion.Software module can be located at random access memory, dodge
It deposits, read-only memory, this fields such as programmable read only memory or electrically erasable programmable memory, register are mature to deposit
In storage media.
As seen through the above description of the embodiments, those skilled in the art can be understood that above-mentioned implementation
All or part of the steps in example method can add the mode of general hardware platform to realize by software.Based on this understanding,
Substantially the part that contributes to existing technology can embody technical solution of the present invention in the form of software products in other words
Out, which can store in storage medium, such as ROM/RAM, magnetic disk, CD, including some instructions
With so that a computer equipment (can be the network communications such as personal computer, server, or Media Gateway to set
It is standby) execute method described in certain parts of each embodiment of the present invention or embodiment.
It should be noted that all the embodiments in this specification are described in a progressive manner, each embodiment it
Between same and similar part may refer to each other, each embodiment focuses on the differences from other embodiments.
For embodiment of the method and apparatus embodiments, since it is substantially similar to system embodiment, so describing to compare
Simply, related place illustrates referring to the part of system embodiment.Equipment and system embodiment described above is only
Schematically, wherein module may or may not be physically separated as illustrated by the separation member, as module
The component of display may or may not be physical module, it can and it is in one place, or may be distributed over more
In a network unit.Some or all of the modules therein can be selected to realize this embodiment scheme according to the actual needs
Purpose.Those of ordinary skill in the art can understand and implement without creative efforts.
The above is only a preferred embodiment of the present invention, it is not intended to limit the scope of the present invention.It should refer to
Out, for those skilled in the art, without departing from the principle of the present invention, can also make several
Improvements and modifications, these modifications and embellishments should also be considered as the scope of protection of the present invention.
The aforementioned description to specific exemplary embodiment of the invention is in order to illustrate and illustration purpose.These descriptions
It is not wishing to limit the invention to disclosed precise forms, and it will be apparent that according to the above instruction, can much be changed
And variation.The purpose of selecting and describing the exemplary embodiment is that explaining specific principle of the invention and its actually answering
With so that those skilled in the art can be realized and utilize a variety of different exemplary implementation schemes of the invention and
Various chooses and changes.The scope of the present invention is intended to be limited by claims and its equivalents.
Claims (10)
1. a kind of intelligent numerical control machine tool control method based on Internet of Things, it is characterised in that: the intelligent machine based on Internet of Things
Bed control method includes the following steps:
Multiple control information are generated at multiple remote control terminals；
By control centre collection system load information A；
The system load information is based on by control centre, can be used in transmitting control information generated in the unit of account time
Number of resources B；
Control information size message transmitted by the multiple remote control terminal is received as control centre, wherein the control
Information size message instruction control information size C；
It is raw by control centre based on the number of resources and the control information size for being used for transmission control information generated
At the contention transmission opportunities D that do not conflict in the unit time；
By control centre prediction the unit time in institute it is received competition transmit number E；
Do not conflict in the unit time contention transmission opportunities D and the received competition of institute in the unit time are based on by control centre
The number E of transmission infers collision probability F；
If the collision probability is greater than threshold value, by a of the received competition transmission of institute in control centre's adjustment unit time
Number is so that the collision probability is less than the threshold value, and defines so that the collision probability is less than the process of the threshold value
The number of the received competition transmission of institute is the number E2 that ideal competition is transmitted in unit time of adjustment；
Number E2 by control centre based on the ideal competition transmission, calculates the remote control terminal for being currently able to be transmitted
Number G；
Allow to send information from control centre to G randomly selected remote control terminal transmissions；
The control information is sent to the control centre from receiving the remote control terminal for allowing to send information；And
The control information is forwarded to numerically-controlled machine tool by control centre.
2. the intelligent numerical control machine tool control method based on Internet of Things as described in claim 1, it is characterised in that: wherein, described
System load information is the occupied ratio of system bandwidth；
Believed by control centre based on the number of resources for being used for transmission control information generated and the control by following formula
Size is ceased, the contention transmission opportunities D that do not conflict in the unit time is generated:
D=1000 × (B/C)
Wherein, can be used in transmitting the unit of the number of resources B of control information generated in the unit time being bit, the control
The unit of information size C is bit.
3. the intelligent numerical control machine tool control method based on Internet of Things as claimed in claim 2, it is characterised in that: by following formula by
Control centre based on do not conflict in the unit time contention transmission opportunities D and in the unit time it is received competition transmission
Number E infers collision probability F:
4. the intelligent numerical control machine tool control method based on Internet of Things as claimed in claim 3, it is characterised in that: by control centre
Predict the unit time in institute it is received competition transmit number E specifically:
In the unit time in predetermined amount of time before determining current time by control centre received transmission number；
By in the unit time in the predetermined amount of time before current time the number of received transmission be multiplied with prearranged multiple,
With obtain in the unit time received competition transmission number E；
Wherein, the range of the prearranged multiple is 1.3-1.5.
5. the intelligent numerical control machine tool control method based on Internet of Things as claimed in claim 4, it is characterised in that: by control centre
The number of the received competition transmission of institute in the unit time is adjusted so that the collision probability is less than the threshold value including as follows
Step:
Do not conflicted contention transmission opportunities D based on the threshold value and in the unit time, and counter push away is received in the unit time
Competition transmission number maximum value；
Determine the Transmission Time Interval of each remote control terminal；
Based in the unit time being back-calculated to obtain the maximum value of number of received competition transmission and identified each remote
The Transmission Time Interval of process control terminal show that the number of the received competition transmission of institute in unit time for being adjusted is ideal
Compete the number E2 of transmission.
6. a kind of intelligent numerical control machine tool control system based on Internet of Things, it is characterised in that: the intelligent number based on Internet of Things
Controlling machine tool control system includes:
Multiple remote terminals, wherein each of the multiple remote terminal remote terminal is configurable to generate multiple control letters
Breath；With
Control centre, the control centre and the multiple remote terminal communicate to connect, and the control centre and numerical control machine
Bed communication connection；
The control centre is configured as:
Collection system load information A；
Based on the system load information, it can be used in the number of resources B for transmitting control information generated in the unit of account time；
Receive control information size message transmitted by the multiple remote control terminal, wherein the control information size disappears
Breath instruction control information size C；
Based on the number of resources and the control information size for being used for transmission control information generated, the unit time is generated
Do not conflict inside contention transmission opportunities D；
Predict the unit time in institute it is received competition transmit number E；
Based on do not conflict in the unit time contention transmission opportunities D and in the unit time it is received competition transmission number
E infers collision probability F；
If the collision probability is greater than threshold value, number that the received competition of institute in the unit time is transmitted is adjusted so that institute
Collision probability is stated less than the threshold value, and is defined so that the collision probability is less than the unit of the threshold value being adjusted
The number of the received competition transmission of institute is the number E2 that ideal competition is transmitted in time；
Based on the number E2 of the ideal competition transmission, the number G for the remote control terminal for being currently able to be transmitted is calculated；
Allow to send information to G randomly selected remote control terminal transmissions；
The control information is sent to the control centre from receiving the remote control terminal for allowing to send information；
The control information is forwarded to numerically-controlled machine tool.
7. the intelligent numerical control machine tool control system based on Internet of Things as claimed in claim 6, it is characterised in that: wherein, described
System load information is the occupied ratio of system bandwidth；
Believed by control centre based on the number of resources for being used for transmission control information generated and the control by following formula
Size is ceased, the contention transmission opportunities D that do not conflict in the unit time is generated:
D=1000 × (B/C)
Wherein, can be used in transmitting the unit of the number of resources B of control information generated in the unit time being bit, the control
The unit of information size C is bit.
8. the intelligent numerical control machine tool control system based on Internet of Things as claimed in claim 7, it is characterised in that: by following formula by
Control centre based on do not conflict in the unit time contention transmission opportunities D and in the unit time it is received competition transmission
Number E infers collision probability F:
9. the intelligent numerical control machine tool control system based on Internet of Things as claimed in claim 8, it is characterised in that: by control centre
Predict the unit time in institute it is received competition transmit number E specifically:
In the unit time in predetermined amount of time before determining current time by control centre received transmission number；
By in the unit time in the predetermined amount of time before current time the number of received transmission be multiplied with prearranged multiple,
With obtain in the unit time received competition transmission number E；
Wherein, the range of the prearranged multiple is 1.3-1.5.
10. the intelligent numerical control machine tool control system based on Internet of Things as claimed in claim 9, it is characterised in that: by control
The heart adjusts the number of the received competition transmission of institute in the unit time so that the collision probability is less than the threshold value including such as
Lower step:
Do not conflicted contention transmission opportunities D based on the threshold value and in the unit time, and counter push away is received in the unit time
Competition transmission number maximum value；
Determine the Transmission Time Interval of each remote control terminal；
Based in the unit time being back-calculated to obtain the maximum value of number of received competition transmission and identified each remote
The Transmission Time Interval of process control terminal show that the number of the received competition transmission of institute in unit time for being adjusted is ideal
Compete the number E2 of transmission.
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