CN115766328A - Low-power-consumption RS485 bus network design method based on power gating - Google Patents
Low-power-consumption RS485 bus network design method based on power gating Download PDFInfo
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Abstract
The invention relates to a 485 bus communication network, belonging to the field of network communication and field bus. In particular to a low-power-consumption RS485 bus network design method based on power gating. The bus network consists of a master control RS485 node, 485 bus lines and a plurality of controlled RS485 nodes. When the master control RS485 node needs to communicate, redundant broadcast type power supply connection control signals are sent to the controlled RS485 nodes, the controlled RS485 nodes are powered on, then information interaction is carried out on the 485 nodes needing to communicate through the 485 bus, after the communication is finished, the master control RS485 nodes send redundant broadcast type power supply connection control signals to the controlled RS485 nodes, and the controlled RS485 nodes are powered off. The RS485 bus network based on power gating has the advantages of low power consumption, high reliability, simple control logic, low introduced power consumption and the like, realizes the full reduction of the overall power consumption of the bus network on the basis of ensuring the communication performance, and can be widely applied to various working scenes of the traditional RS485 bus network.
Description
Technical Field
The invention relates to a 485 bus communication network, belonging to the field of network communication and field bus. In particular to a low-power-consumption RS485 bus network design method based on power gating.
Background
In the application field of the RS485 bus, along with the increasing complexity of system design, the number of network nodes is increased, the power consumption of the bus network is increased, and the effective control of the power consumption is more important under the condition of ensuring the communication function of the bus network. A low-power-consumption RS485 bus network design method based on power gating is applied to the fields of network communication and field buses. Based on the analysis of the power consumption requirement of the RS485 bus network, a power supply gate control circuit is designed, and real-time power on-off control based on task requirements is carried out on each level of power supplies of the RS485 bus network. The bus network is in a power-on state only when a communication task is carried out, and is in a power-off state in the rest time, so that the overall power consumption of the RS485 bus network in a task period is fully reduced.
CN213661645U RS485 communication-based signal detection and awakening circuit
The utility model relates to the field of communication technology, specifically be signal detection and awakening circuit based on RS485 communication, the performance is that the battery is connected with the step-down module, and the module is kept apart with the power to the step-down module and is connected, and the power is kept apart the module and is connected with the 485 chip, and the 485 chip is kept apart module both way junction with the signal, and the 485 chip detects and awakens the module up through 485 bus line with the signal, and the signal detects and awakens the module up and is connected with the step-down module. The utility model has the advantages of: the power supply is turned off when the circuit is in a low power consumption state, and the power supply is waken up when 485 communication signals are detected, so that the power supply efficiency is improved.
CN107918331A low-power consumption RS485 passive awakening device with isolation and method
The invention provides a low-power-consumption RS485 passive wake-up device with isolation, which comprises an RS485 upper computer, an RS485 isolation wake-up circuit, an RS485 isolation interface circuit, an MCU (micro control unit) mainboard and a sensor complete machine power supply, wherein the RS485 isolation wake-up circuit comprises an isolation unit, a protection unit, a sampling unit, a detection unit and a filtering unit; the port A and the port B of the RS485 upper computer are connected with an isolation unit and an RS485 isolation interface circuit, the isolation unit is connected with a protection unit and a sampling unit, the protection unit is connected to the port A, a detection unit is connected with the sampling unit, a filtering unit and a sensor complete machine power supply, an MCU mainboard is connected with the filtering unit, the RS485 isolation interface circuit and the sensor complete machine power supply, and the sensor complete machine power supply is connected to the RS485 isolation interface circuit. The invention also provides a low-power consumption RS485 passive awakening method with isolation, and the whole standby power consumption is effectively reduced.
Search result 1 different point analysis:
1. the control mechanisms are different: the patent of novelty retrieval builds a hardware circuit through a MOSFET device, detects bus differential signals, and judges whether high level of the bus signals comes according to hardware, so as to output power supply enabling signals; the patent judges the output of the power supply control signal through software based on task requirements
2. The control objects are different, the control object of the searched new patent is only the power supply of the 485 protocol chip, and the control objects of the invention are all power supplies of 485 nodes (including a data isolation circuit);
3. the implementation modes are different, the power supply control is carried out on the new-found patent through an enabling end of an enabling power supply module, and the 485 node power supply signal is directly controlled through a gate control circuit;
4. the emphasis points of the patent are different, the emphasis point of the patent for searching is a bus signal detection and wake-up circuit of a single RS485 node, and the emphasis point of the patent is a low-power-consumption 485 bus network and a control strategy thereof.
Search results 2 different point analysis:
1. the control mechanisms are different: the patent of searching for new is that a bus differential signal is detected through an isolation circuit, a sampling circuit and a detection circuit, and whether the bus signal exists or not is judged according to hardware, so that a power supply enabling signal is output; the patent judges the output of a power supply control signal through software based on task requirements;
2. the control objects are different, the control object of the new patent is the power supply of a single RS485 node, and the control object of the invention is the power supply of the slave RS485 node in a master-slave RS485 network;
3. the realization modes are different, the new patent is searched, a power supply trigger signal is extracted through an isolation circuit, a sampling circuit and a detection circuit, and a 485 power supply electrifying instruction is sent through an MCU mainboard; the RS485 node power supply of the patent is respectively controlled by a master control RS485 node and a controlled RS485 node;
4. the emphasis points of the patent for searching are different, the emphasis point of the patent for searching is a single RS485 node awakening circuit, and the emphasis point of the patent for searching is a low-power-consumption 485 bus network and a control strategy thereof.
Although there are 2 patents related to the present invention, the first patent emphasizes the detection circuit, control mechanism, control object, and implementation manner, which are all different from the present invention; the second patent emphasizes a single-node passive wake-up method, and a control mechanism, a control object, an implementation mode and the like are greatly different from the content of the invention.
Disclosure of Invention
Technical scheme
The purpose of the invention can be realized by the following technical scheme:
a low-power-consumption RS485 bus network based on power gating is characterized in that the bus network is composed of three parts, namely a master control RS485 node, a 485 bus line and a plurality of controlled RS485 nodes. When the master control RS485 node needs to communicate, redundant broadcast type power supply connection control signals are sent to the controlled RS485 nodes, the controlled RS485 nodes are powered on, then information interaction is carried out on the 485 nodes needing to communicate through the 485 bus, after the communication is finished, the master control RS485 nodes send redundant broadcast type power supply connection control signals to the controlled RS485 nodes, and the controlled RS485 nodes are powered off.
Furthermore, the master control RS485 node is composed of a master control node processor module, a master control 485 protocol module and a redundant control signal isolation module. The master control node processor module sends master control 485 power supply control signal 1 and master control 485 power supply control signal 2 to the redundancy control signal isolation module based on the communication task requirement, after the redundancy control signal isolation module electrically isolates the master control 485 power supply control signal 1 and the master control 485 power supply control signal 2, the pair 485 control signals which are redundant are sent to the corresponding controlled RS485 node, so that the corresponding controlled RS485 node power supply is controlled, and the reliability of the power supply control of the controlled RS485 node is effectively improved by the redundancy of the 485 control signals.
Further, when a communication task exists, the sent master control 485 power supply control signal 1 and the sent master control 485 power supply control signal 2 are power supply connection instructions, and when no communication task exists, the sent master control 485 power supply control signal 1 and the sent master control 485 power supply control signal 2 are power supply disconnection instructions.
Furthermore, the master control 485 protocol module consists of a 485 protocol chip and an isolation chip.
Furthermore, the redundancy control signal isolation module is composed of a plurality of double-channel magnetic couples and diodes, two inputs of each double-channel magnetic couple are a master control 485 power supply control signal 1 and a master control 485 power supply control signal 2 respectively, 485 control signals output by each double-channel magnetic couple are mutually independent, 485 control signals output by the same double-channel magnetic couple are redundancy control signals mutually, and redundancy control signals output by each double-channel magnetic couple are isolated through the diodes so as to prevent the redundancy control signals from interfering with each other.
Further, the controlled RS485 node is composed of a 4855V power supply control module, a 4855V control signal acquisition module, a controlled node processor module, a 485 3.3V power supply control module and a controlled 485 protocol module. The 4855V power supply control module is composed of an analog switch, a control end of the analog switch is a 485 control signal, an input of the analog switch is a 5V power supply, an output of the analog switch is a 4855V power supply, when the level of the control end of the analog switch is on and enabled, the analog switch outputs the 4855V power supply, and otherwise, the analog switch disconnects the 4855V power supply.
Furthermore, the 4855V control signal acquisition module is composed of a magnetic couple, and after the 485 control signal acquisition module electrically isolates the 485 control signal, the 485 control isolation signal is sent to the controlled node processor module.
Further, after the controlled node processor module receives the 485 control isolation signal sent by the 4855V control signal acquisition module, the controlled node processor module judges according to the 485 control isolation signal level logic and sends a 3.3V power supply control signal to the controlled 485 protocol module, so that the controlled 485 protocol module is powered on when communication is needed and powered off when no communication task is available.
Furthermore, the controlled 485 protocol module consists of a 485 protocol chip and an isolation chip, wherein the 485 protocol chip power supply is controlled by a 4855V power supply control module, and the isolation chip power supply is controlled by the 4855V power supply control module and a 485 3.3V power supply control module respectively.
Furthermore, a one-master multi-slave distributed bus architecture is adopted, and the master control RS485 node controls the 485 protocol module power supplies of the controlled RS485 nodes.
Further, a one-master multi-slave broadcast type power supply control strategy is adopted, specifically, a master control RS485 node controls a 485 protocol module power supply of a controlled RS485 node based on task requirements, when a communication task needs to be carried out, 485 protocol modules of the RS485 nodes are powered on, and when the communication task does not need to be carried out, the 485 protocol modules of the RS485 nodes are powered off.
Furthermore, a control strategy for uniformly controlling the power-on state of the controlled RS485 node power supply is adopted, so that each controlled RS485 node power supply is switched on and off, the unidirectional information sent by the master control node can be transmitted in a broadcast mode, and the real-time performance of bus unidirectional master control information transmission is improved.
Technical effects
The RS485 bus network design method based on power gating is applied to the field of field communication buses, and the dual power supplies of the controlled 485 protocol modules of the controlled RS485 nodes of the RS485 bus network are controlled, so that the power consumption of the RS485 bus network is finely reduced, and the control effect of the power consumption of the RS485 bus network is improved. The master control RS485 node is adopted as the master control node, the controlled 485 protocol module power supply of the controlled RS485 nodes of the RS485 bus network is controlled according to task requirements, the power consumption of the RS485 bus network can be adjusted in real time according to communication task requirements, the functionality of the bus network is guaranteed, and the power consumption of the bus network is fully reduced. The master control RS485 node controls the controlled 485 protocol module power supplies of the controlled RS485 nodes in a broadcasting mode, so that the power consumption of the bus can be reduced systematically, and the control logic is simple. And a redundant control signal isolation module is designed to perform redundant control on the power consumption of the RS485 bus network, so that the power consumption control of the bus has high reliability. For the 4855V power control module and the 485 3.3V power control module, a high-speed analog switch design is adopted, so that the power consumption control response speed of the RS485 bus network is high, and the introduced power consumption of the power consumption control circuit is low. In addition, control signals of a 4855V power supply and a 485 3.3V power supply of the RS485 bus network are electrically isolated, so that mutual interference between the two control signals is effectively avoided, and the reliability of power consumption control of the RS485 bus network is improved.
The RS485 bus network based on power gating has the advantages of low power consumption, high reliability, simple control logic, low introduced power consumption and the like, realizes the full reduction of the overall power consumption of the bus network on the basis of ensuring the communication performance, and can be widely applied to various working scenes of the traditional RS485 bus network.
Drawings
FIG. 1 is a diagram of a power gating-based low-power RS485 bus network architecture;
FIG. 2 is a diagram of a redundant control signal isolation module;
FIG. 3 is a block diagram of a 4855V power control module;
FIG. 4 is a block diagram of a controlled 485 protocol module;
fig. 5 is a diagram of a 485.3v power control module.
Detailed Description
The present invention will be further described with reference to the following examples. The following description is only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
The low-power-consumption RS485 bus network based on power gating consists of a master control RS485 node, a 485 bus line and a plurality of controlled RS485 node groups.
The invention is provided with a master control RS485 node and a plurality of controlled RS485 nodes; the master control RS485 node carries out isolated voting output on a master control 485 power supply control signal 1 and a master control 485 power supply control signal 2 sent by a master control node processor module through a redundancy control signal isolation module so as to realize a one-to-many master-slave high-reliability redundancy control scheme; the master control RS485 node issues a power supply on-off instruction to the controlled RS485 node based on the communication task requirement with the controlled RS485 node; the 485 protocol module of the controlled RS485 node receives on-off instruction control of the working power supply of the master control RS485 node, is in a power-on state when a communication task needs to be carried out, ensures communication performance, and is in a power-off state when the communication task does not need to be carried out, so that the power consumption of a bus network is reduced. According to the scheme, power gating of the RS485 bus communication network node is achieved through network architecture design and control strategy design, and the overall power consumption of the RS485 bus communication network is effectively reduced.
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
Fig. 1 shows a low-power consumption RS485 bus network architecture diagram based on power gating, where the bus network is composed of three parts, namely a master control RS485 node, a 485 bus line, and a plurality of controlled RS485 nodes. When the master control RS485 node needs to communicate, redundant broadcast type power supply connection control signals are sent to the controlled RS485 nodes, the controlled RS485 nodes are powered on, then information interaction is carried out on the 485 nodes needing to communicate through the 485 bus, after the communication is finished, the master control RS485 nodes send redundant broadcast type power supply connection control signals to the controlled RS485 nodes, and the controlled RS485 nodes are powered off. 1 master control RS485 node is designed to be used as a master control node of bus energy, and the aim is to establish a bus energy broadcast control mechanism matched with the communication task requirement. The bus energy is output based on task requirements, and the power consumption reduction effect of the bus network is obvious; the bus energy is uniformly controlled, so that the control logic is simple and efficient, the required software and hardware resources are reduced, the complexity of the bus network is reduced, and the energy of the bus network is further controlled at a lower level.
The master control RS485 node consists of a master control node processor module, a master control 485 protocol module and a redundant control signal isolation module. The master control RS485 node realizes a bus energy control function through a master control node processor module, based on communication task requirements, a master control 485 power supply control signal 1 and a master control 485 power supply control signal 2 are sent to a redundancy control signal isolation module, and after the redundancy control signal isolation module electrically isolates the master control 485 power supply control signal 1 and the master control 485 power supply control signal 2, paired 485 control signals which are redundant with each other are sent to the corresponding controlled RS485 node to control the power supply of the corresponding controlled RS485 node. The master control RS485 node is designed to send out two independent and mutually master and slave redundant control signals to each controlled RS485 node, the purpose is to improve the reliability of energy control of the low-power RS485 bus network, and when the master control signal fails, the real-time controllability of the bus energy can still be ensured through the sent backup control signal. In addition, the redundant control signals are isolated and output, so that the electrical isolation between the master control RS485 node and each controlled RS485 node can be realized, and the propagation of single-point faults in the bus network can be effectively avoided.
Fig. 2 is the redundant control signal of master control RS485 node keeps apart the module, redundant control signal keeps apart the module and comprises a plurality of binary channels magnetic coupling and diode, and two inputs of each binary channels magnetic coupling are master control 485 power control signal 1 and master control 485 power control signal 2 respectively, and the 485 control signal of each binary channels magnetic coupling output is independent each other, and the 485 control signal of same binary channels magnetic coupling output each other is redundant control signal, and the redundant control signal of each binary channels magnetic coupling output keeps apart through the diode. The redundancy control signal isolation module adopts a double-channel magnetic couple as an isolation chip, aims to realize an isolation function by using as few hardware resources as possible, can meet the transmission requirement of a redundancy control signal by using 1 chip, and improves the integration level of a bus network; in addition, in an isolation mode, the magnetic coupling is adopted for minimizing the power consumption of the redundant control signal isolation module, and the ultra-low power consumption characteristic of the magnetic coupling is utilized for keeping the power consumption of the bus network at a lower level; finally, a diode is designed at the isolation output end of the redundant control signal to realize the voting output function of the 485 control signal, so that the electrical isolation among the 485 control signals is realized, the mutual interference of the 485 control signals is avoided, and the reliability of the bus energy control function is effectively improved.
The controlled RS485 node is composed of a 4855V power supply control module, a 4855V control signal acquisition module, a controlled node processor module, a 485 3.3V power supply control module and a controlled 485 protocol module.
Fig. 3 shows the 4855V power supply control module, the 4855V power supply control module is composed of an analog switch, the control end of the analog switch is a 485 control signal, the input of the analog switch is a 5V power supply, the output of the analog switch is a 4855V power supply, when the level of the control end of the analog switch is on enable, the analog switch outputs the 4855V power supply, otherwise, the analog switch disconnects the 4855V power supply. The 4855V power supply control chip is used as the analog switch, so that the 4855V power supply control module has high-speed response capability to input signals, and the analog switch has ultralow power consumption characteristics, so that the power consumption of the 4855V power supply control module is greatly reduced, and the whole power consumption of a bus network is favorably controlled at a lower level.
FIG. 5 shows a 4855V control signal acquisition module, a controlled node processor module, and a 485 3.3V power control module.
The 4855V control signal acquisition module is composed of magnetic couples, and after the 485 control signal acquisition module electrically isolates the 485 control signal, the 485 control isolation signal is sent to the controlled node processor module. The 4855V control signal acquisition module has lower power consumption by adopting a magnetic isolation design, and the overall power consumption of the RS485 bus network with low power consumption is favorably reduced; in addition, 4855V control signals are designed and isolated and then output to the controlled node processor module, so that the controlled node processor module is electrically isolated from the outside, and the reliability of the controlled node processor module is improved.
And after the controlled node processor module receives a 485 control isolation signal sent by the 4855V control signal acquisition module, the controlled node processor module judges according to 485 control isolation signal level logic, and sends a 3.3V power supply control signal to the controlled 485 protocol module through the 485 3.3V power supply control module, so that the controlled 485 protocol module is powered on when communication is needed, and is powered off when no communication task exists. The 3.3V power supply of the controlled 485 protocol module is controlled by the controlled processor node, so that the 3.3V power supply of the controlled 485 protocol module is controlled in real time based on task requirements, the energy use efficiency of the bus network is improved, the power consumption of the bus network is reduced finely, and the whole power consumption of the bus network is reduced fully by the circuit.
485 3.3V power control module comprises analog switch, and analog switch control end is 485 control signal, and the analog switch input is the 3.3V power, and analog switch output is the 485.3V power, and when analog switch control end level for the switch-on enabled, the 485.3V power of analog switch output, otherwise, the 485.3V power of analog switch disconnection. Adopt analog switch as 485 3.3V power control chip, make 485 3.3V power control module have high-speed response ability to input signal, and because analog switch has the power consumption characteristic of ultralow, greatly reduced 485 3.3V power control module self consumption, help reducing the whole consumption of bus network.
The controlled 485 protocol module consists of a 485 protocol chip and an isolation chip, wherein the 485 protocol chip power supply is controlled by a 4855V power supply control module, and the isolation chip power supply is controlled by the 4855V power supply control module and a 485 3.3V power supply control module respectively. The 5V power supply and the 3.3V power supply of the controlled 485 protocol module are subjected to linkage control, so that the real-time performance and the efficiency of bus network energy management are improved, and the bus network energy is fully reduced.
The low-power-consumption RS485 bus network based on power gating adopts a distributed bus architecture with one master and multiple slaves, and the master RS485 node controls the 485 protocol module power supplies of a plurality of controlled RS485 nodes. The method adopts a one-master multi-slave broadcast power supply control strategy, specifically, a master control RS485 node controls a 485 protocol module power supply of a controlled RS485 node based on task requirements, when a communication task needs to be carried out, a 485 protocol module of each RS485 node is powered on, and when the communication task does not need to be carried out, the 485 protocol module of each RS485 node is powered off. The control strategy for uniformly controlling the power-on state of the controlled RS485 node power supply ensures that each controlled RS485 node power supply is simultaneously switched on and off, thereby not only ensuring that the unidirectional information sent by the master control node can be transmitted in a broadcast manner, but also improving the real-time performance of the unidirectional master control information transmission of the bus.
Example 1
The low-power-consumption RS485 bus network based on power gating is characterized in that the bus network consists of three parts, namely a master control RS485 node, a 485 bus line and a plurality of controlled RS485 nodes. When the master control RS485 node needs to communicate, redundant broadcast type power supply connection control signals are sent to the plurality of controlled RS485 nodes, the plurality of controlled RS485 nodes are powered on, then information interaction is carried out on the 485 nodes needing to communicate through the 485 bus, and after the communication is finished, the master control RS485 nodes send redundant broadcast type power supply connection control signals to the plurality of controlled RS485 nodes, and the plurality of controlled RS485 nodes are powered off.
The RS485 node is characterized by consisting of a master control node processor module, a master control 485 protocol module and a redundant control signal isolation module. The master control node processor module sends master control 485 power supply control signal 1 and master control 485 power supply control signal 2 to the redundancy control signal isolation module based on the communication task requirement, after the redundancy control signal isolation module electrically isolates the master control 485 power supply control signal 1 and the master control 485 power supply control signal 2, the pair 485 control signals which are redundant are sent to the corresponding controlled RS485 node, so that the corresponding controlled RS485 node power supply is controlled, and the reliability of the power supply control of the controlled RS485 node is effectively improved by the redundancy of the 485 control signals.
The method is characterized in that when a communication task is available, the sent master control 485 power supply control signal 1 and the sent master control 485 power supply control signal 2 are power supply on instructions, and when no communication task is available, the sent master control 485 power supply control signal 1 and the sent master control 485 power supply control signal 2 are power supply off instructions.
The master control 485 protocol module is characterized by consisting of a 485 protocol chip and an isolation chip.
The redundant control signal isolation module is characterized by comprising a plurality of double-channel magnetic couples and diodes, wherein two inputs of each double-channel magnetic couple are a master control 485 power supply control signal 1 and a master control 485 power supply control signal 2 respectively, 485 control signals output by each double-channel magnetic couple are independent, the 485 control signals output by the same double-channel magnetic couple are redundant control signals mutually, and the redundant control signals output by each double-channel magnetic couple are isolated through the diodes so as to prevent the redundant control signals from interfering with each other.
The RS485 controlled node is characterized by consisting of a 4855V power supply control module, a 4855V control signal acquisition module, a controlled node processor module, a 485 3.3V power supply control module and a controlled 485 protocol module. The 4855V power supply control module is composed of an analog switch, a control end of the analog switch is a 485 control signal, an input of the analog switch is a 5V power supply, an output of the analog switch is a 4855V power supply, when the level of the control end of the analog switch is on and enabled, the analog switch outputs the 4855V power supply, and otherwise, the analog switch disconnects the 4855V power supply.
The 485 controlled node control system is characterized in that the 4855V control signal acquisition module consists of a magnetic couple, and after the 485 control signal acquisition module electrically isolates the 485 control signal, the 485 control isolation signal is sent to the controlled node processor module.
The communication system is characterized in that after the controlled node processor module receives a 485 control isolation signal sent by the 4855V control signal acquisition module, the control system judges according to the 485 control isolation signal level logic and sends a 3.3V power supply control signal to the controlled 485 protocol module, so that the controlled 485 protocol module is powered on when communication is needed and powered off when no communication task exists.
The controlled 485 protocol module is characterized by consisting of a 485 protocol chip and an isolation chip, wherein a 485 protocol chip power supply is controlled by a 4855V power supply control module, and an isolation chip power supply is controlled by the 4855V power supply control module and a 485 3.3V power supply control module respectively.
The method is characterized in that a master-slave distributed bus architecture is adopted, and a master control RS485 node controls 485 protocol module power supplies of a plurality of controlled RS485 nodes.
The method is characterized in that a one-master multi-slave broadcast type power supply control strategy is adopted, specifically, a master control RS485 node controls a 485 protocol module power supply of a controlled RS485 node based on task requirements, when a communication task needs to be carried out, 485 protocol modules of the RS485 nodes are powered on, and when the communication task does not need to be carried out, the 485 protocol modules of the RS485 nodes are powered off.
The method is characterized in that a control strategy for uniformly controlling the power-on state of the controlled RS485 node power supply is adopted, and the controlled RS485 node power supplies are switched on and off simultaneously, so that the unidirectional information sent by the master control node can be transmitted in a broadcast manner, and the real-time performance of the bus unidirectional master control information transmission is improved.
It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein. The above-mentioned embodiments, objects, technical solutions and advantages of the present invention are further described in detail, it should be understood that the above-mentioned embodiments are only illustrative of the present invention and are not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A low-power-consumption RS485 bus network based on power gating is characterized in that the bus network consists of three parts, namely a master control RS485 node, a 485 bus line and a plurality of controlled RS485 nodes; when the master control RS485 node needs to communicate, redundant broadcast type power supply connection control signals are sent to the plurality of controlled RS485 nodes, the plurality of controlled RS485 nodes are powered on, then information interaction is carried out on the 485 nodes needing to communicate through the 485 bus, and after the communication is finished, the master control RS485 nodes send redundant broadcast type power supply connection control signals to the plurality of controlled RS485 nodes, and the plurality of controlled RS485 nodes are powered off.
2. The power gating-based low-power-consumption RS485 bus network according to claim 1, wherein the master RS485 node consists of a master node processor module, a master 485 protocol module, and a redundant control signal isolation module; the master control node processor module sends master control 485 power supply control signal 1 and master control 485 power supply control signal 2 to the redundancy control signal isolation module based on the communication task requirement, after the redundancy control signal isolation module electrically isolates the master control 485 power supply control signal 1 and the master control 485 power supply control signal 2, the pair 485 control signals which are redundant are sent to the corresponding controlled RS485 node, so that the corresponding controlled RS485 node power supply is controlled, and the reliability of the power supply control of the controlled RS485 node is effectively improved by the redundancy of the 485 control signals.
3. The RS485 bus network with low power consumption and gate control based on the power supply as claimed in claim 1, wherein the master control 485 power supply control signal 1 and the master control 485 power supply control signal 2 are power supply on commands when there is a communication task, and the master control 485 power supply control signal 1 and the master control 485 power supply control signal 2 are power supply off commands when there is no communication task.
4. The RS485 bus network with low power consumption and based on power gating as claimed in claim 1, wherein the master 485 protocol module is composed of a 485 protocol chip and an isolation chip.
5. The RS485 bus network with low power consumption and based on power gating as claimed in claim 1, wherein the redundancy control signal isolation module is composed of a plurality of dual channel magnetic couples and diodes, two inputs of each dual channel magnetic couple are a master control 485 power supply control signal 1 and a master control 485 power supply control signal 2, 485 control signals output by each dual channel magnetic couple are independent of each other, 485 control signals output by the same dual channel magnetic couple are redundancy control signals, and redundancy control signals output by each dual channel magnetic couple are isolated through the diodes to prevent the redundancy control signals from interfering with each other.
6. The power gating-based low-power consumption RS485 bus network as claimed in claim 1, wherein the controlled RS485 node is composed of a 4855V power control module, a 4855V control signal acquisition module, a controlled node processor module, a 485 3.3V power control module, and a controlled 485 protocol module; the 4855V power supply control module is composed of an analog switch, a control end of the analog switch is a 485 control signal, an input of the analog switch is a 5V power supply, an output of the analog switch is a 4855V power supply, when a level of the control end of the analog switch is on-enabled, the analog switch outputs the 4855V power supply, and otherwise, the analog switch disconnects the 4855V power supply.
7. The power gating-based low-power RS485 bus network as claimed in claim 1, wherein the 4855V control signal acquisition module is composed of a magnetic couple, and after the 485 control signal is electrically isolated by the 4855V control signal acquisition module, the 485 control isolation signal is sent to the controlled node processor module.
8. The power gating-based low-power-consumption RS485 bus network as claimed in claim 1, wherein the controlled node processor module receives the 485 control isolation signal from the 4855V control signal acquisition module, and then makes a judgment according to the 485 control isolation signal level logic, and sends a 3.3V power control signal to the controlled 485 protocol module, so that the controlled 485 protocol module is powered on when communication is needed, and powered off when no communication task is available.
9. The RS485 bus network with low power consumption and gate control based on the power supply as claimed in claim 1, wherein the controlled 485 protocol module is composed of a 485 protocol chip and an isolation chip, wherein the 485 protocol chip power supply is controlled by a 4855V power supply control module, and the isolation chip power supply is controlled by the 4855V power supply control module and a 485 3.3V power supply control module respectively.
10. The power gating-based low-power consumption RS485 bus network as claimed in claim 1, wherein a master multi-slave distributed bus architecture is adopted, and a master RS485 node controls 485 protocol module power supplies of a plurality of controlled RS485 nodes; the method adopts a one-master multi-slave broadcast power supply control strategy, and specifically comprises the steps that a master control RS485 node controls a 485 protocol module power supply of a controlled RS485 node based on task requirements, when a communication task needs to be carried out, a 485 protocol module of each RS485 node is powered on, and when a communication task does not need to be carried out, a 485 protocol module of each RS485 node is powered off; and a control strategy for uniformly controlling the power-on state of the controlled RS485 node power supply is adopted, so that each controlled RS485 node power supply is switched on and off simultaneously, the unidirectional information sent by the master control node can be transmitted in a broadcast manner, and the real-time performance of the bus unidirectional master control information transmission is improved.
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