CN111697702B - Intelligent control system for USB charging port of stadium seat - Google Patents

Intelligent control system for USB charging port of stadium seat Download PDF

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Publication number
CN111697702B
CN111697702B CN202010596918.2A CN202010596918A CN111697702B CN 111697702 B CN111697702 B CN 111697702B CN 202010596918 A CN202010596918 A CN 202010596918A CN 111697702 B CN111697702 B CN 111697702B
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China
Prior art keywords
resistor
communication
power supply
bus
intelligent control
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CN111697702A (en
Inventor
姚炜
戚琛琛
唐晓俊
童巍
吴颉
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Shanghai Electrical Apparatus Research Institute Group Co Ltd
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Shanghai Electrical Apparatus Research Institute Group Co Ltd
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
    • H02J13/00002—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by monitoring
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
    • H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
    • H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
    • H02J13/00007—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using the power network as support for the transmission
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
    • H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
    • H02J13/00016—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using a wired telecommunication network or a data transmission bus
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
    • H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
    • H02J13/00019—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using optical means
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
    • H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
    • H02J13/00022—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using wireless data transmission
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
    • H02J13/00032—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J2207/30—Charge provided using DC bus or data bus of a computer

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Remote Monitoring And Control Of Power-Distribution Networks (AREA)

Abstract

The invention discloses an intelligent control system for a USB charging port of a stadium seat. The comprehensive operation condition of the power supply and communication network of the system is monitored by the real-time on-line monitoring technology, and the automatic, program-controlled and manual modes are adopted to control the switch and the mode conversion of the multifunctional direct current power supply terminal (seat USB charging port), so that the humanized convenience service function and the whole weak current intelligent level of the stadium are greatly improved. The novel power bus technology is applied to a stadium seat USB charging system, the control signals are modulated on the power supply cable to meet the requirements of equipment power supply and communication, the traditional separated control cable and power supply cable are replaced, the communication stability is greatly improved, the high-communication anti-interference capability is provided, various wires used on site can be adapted, the wires are laid in any topology mode, the function of remote communication is realized, construction wiring is greatly facilitated, misconnection can be prevented, and construction maintenance is simplified.

Description

Intelligent control system for USB charging port of stadium seat
Technical Field
The invention relates to an intelligent control system for a USB charging port of a stadium seat, in particular to an intelligent control system for a direct current power supply system, which is applied to the USB charging port of the stadium seat by a power supply bus technology.
Background
The mobile phone is used as a 'member' of multimedia, especially the 'cross-talk' of the intelligent machine, which greatly overturns the past 'cognitive viewing', chatting, video, games, microblog, shopping and navigation … …, is convenient and quick, so that modern people are more and more separated from the mobile phone, and the mobile phone is an indispensable part of modern life. As smart phones continue to increase in functionality, people appear to be increasingly more separated from it in daily life. The low battery prompt of the mobile phone, namely that the battery is lower than 20%, is seen, and some people even have tension and anxiety. The mobile phone USB charging requirement of modern people at any time and any place is never considered in the construction of the past stadium, and along with the newly-built and newly-built expansion of the new generation stadium, the requirement of a direct current power supply system of a seat USB charging terminal of the stadium is increasingly larger, the system can become an indispensable part of the electromechanical infrastructure of the construction of the new generation stadium, and is integrated into the unified control and management of the whole intelligent weak current system. However, the existing intelligent control of the direct current power supply system of the stadium seat USB charging port lacks unified construction and safety standard standards, and the traditional intelligent control and management method for the building has the problems of large investment, complex system, poor safety, reliability, poor maintainability and the like. At present, the intelligent control system of the direct current power supply system of the USB charging port of the stadium seat is only one idea in many stadiums, only stays in the recognition stage, and does not use the power supply bus technology, the system engineering and the informatization method to carry out overall planning on the direct current power supply system management of the USB charging port of the stadium seat, thereby influencing the efficient, safe and reliable operation and application of the system in the stadium practice. The current industrial communication control mode mainly uses the traditional RS-485 bus communication. Because of the complexity of the stadium field environment, communication faults caused by the wrong connection and reverse connection of the communication line and the power line bring trouble to the field debugging and maintenance, cause economic loss and time waste, greatly reduce the reliability and maintainability of the system and reduce the efficiency.
Disclosure of Invention
The purpose of the invention is that: the intelligent control system of the direct current power supply system based on the power supply bus technology is innovatively applied to the USB charging port of the stadium seat, so that the optimal effects of low cost and high efficiency of the direct current power supply system of the USB charging port of the stadium seat are achieved.
In order to achieve the above purpose, the technical scheme of the invention is to provide an intelligent control system for a USB charging port of a stadium seat, which is characterized in that: the system comprises a direct current power supply system management platform, a direct current power supply area monitoring host, a communication power distribution controller and an intelligent control terminal module from top to bottom according to a communication control level, wherein the direct current power supply system management platform adopts an industrial computer, a serial communication interface and a network interface to exchange information with an external system and is used for management and control of the whole system.
The direct-current power supply area monitoring host establishes communication connection with the direct-current power supply system management platform through the optical fiber transceiver, is used for monitoring the working state of each lower-layer device in real time and reporting faults and events to the direct-current system management platform;
the communication distribution controller is connected with the direct current power supply area monitoring host through a communication bus and a power supply line, is used for completing the upper protocol and lower communication routing, and is used for completing the link modulation of communication data and a power supply, and the power supply line and the communication bus are combined into a whole through the Powerbus master station controller, so that the communication distribution controller outputs part of communication signals and shares one bus with the power supply;
And the intelligent control terminal module is connected with the output end of the communication power distribution controller through a Powerbus power supply bus, and provides a power output port in an intelligent control mode according to a main control instruction of the direct-current power supply system management platform so as to realize USB charging management.
Preferably, the dc power system management platform includes a central controller, an industrial network switch, and a fiber optic transceiver; the central controller establishes communication connection with the direct current power supply area monitoring host through the industrial network switch and the optical fiber transceiver.
Preferably, the input end of the direct current power supply area monitoring host is connected to the industrial network switch of the direct current power supply system management platform through the optical fiber transceiver, and the output end of the direct current power supply area monitoring host is connected with the communication power distribution controller through a communication bus mode.
Preferably, the communication distribution controller comprises a communication routing unit, a communication signal modulation unit, an output control unit, an AC/DC switching power supply and a miniature circuit breaker, wherein the input end of the communication routing unit is connected with the output end of the direct current power supply area monitoring host through a communication bus, the output end of the communication routing unit is connected with the output control unit through the communication signal modulation unit, and the 220V input power supply is connected with the output control unit through the miniature circuit breaker and the AC/DC switching power supply to output DC24V safety voltage.
Preferably, the intelligent control terminal module comprises a Powerbus slave receiver, a bus communication IO intelligent control unit, a USB charging module, a human body detection unit and a sensing information input unit, wherein the Powerbus slave receiver is connected with the output end of the output control unit of the communication distribution controller through a Powerbus power supply bus, the power supply output interface of the Powerbus slave receiver is connected with the power supply input interface of the bus communication IO intelligent control unit, the DC24V voltage is controlled and output through the power supply intelligent output interface of the bus communication IO intelligent control unit, and the DC24V voltage is used as the input of the USB charging module to realize USB charging through voltage transformation output; the communication signal output interface of the Powerbus bus slave receiver is connected with the communication input interface of the bus communication IO intelligent control unit, and is connected with the human body detection unit and the sensing information input unit through the information acquisition output interface of the bus communication IO intelligent control unit.
Preferably, the intelligent control terminal module is provided with 2 specifications of a double-position intelligent control terminal and a unit intelligent control terminal.
Preferably, the Powerbus master station controller circuit includes a power supply, an EV620 circuit board, a fuse F1, a power tube Q1, a transistor Q2, a transistor Q3, a capacitor C11, a resistor R12, a resistor R13 and a unidirectional TVS tube, wherein the power supply is respectively connected with one end of the capacitor C11, a source electrode of the power tube Q1 and a v+ pin of the EV620 circuit board through the fuse F1, the other end of the capacitor C11 is grounded, a grid electrode of the power tube Q1 is connected with a BH pin of the EV620 circuit board through the resistor R12, a drain electrode of the power tube Q1 is respectively connected with an l+ pin of the EV620 circuit board, an emitter electrode of the transistor Q3, one end of the resistor R11, a negative electrode of the unidirectional TVS tube and a base electrode of the Powerbus bus tube Q2, a base electrode of the transistor Q3 is respectively connected with another end of the resistor R11 and an emitter electrode of the EV pin Q2 through the resistor R13, a collector electrode of the transistor Q2 and a positive electrode of the unidirectional TVS tube are respectively connected with another EV bus line of the Powerbus 620 circuit board.
Preferably, the core chip of the EV620 circuit board is a PB620 chip, an HP pin of the PB620 chip is connected to a BAUD pin of the EV620 circuit board, a BRK pin is connected to a BRK pin of the EV620 circuit board, a COHN pin is connected to a base of a triode T1, an emitter of the triode T1 is grounded through a resistor R2, a collector of the triode T1 is respectively connected to one end of the resistor R1, a base of the triode T2 and a base of the triode T3, and a collector of the triode T2 is respectively connected to the other end of the resistor R1 and a v+ pin of the EV620 circuit board; the collector of the triode T3 is grounded, the emitter of the triode T2 is respectively connected with the emitter of the triode T3, one end of the resistor R3 and one end of the capacitor C1, and the other end of the resistor R3 is respectively connected with the other end of the capacitor C1 and a BH pin of the EV620 circuit board; the 3V3 pin of PB620 chip connects capacitor C4 and one end of capacitor C15 respectively, the other end ground of capacitor C4 connects reference ground and the OUT pin of LDO respectively, the GND pin of LDO is grounded, the IN pin of LDO connects the VCC end of EV620 circuit board and the IN pin of regulator LM317 respectively, the ADJ pin of regulator LM317 connects one end of resistor R6 respectively, the collector of triode T4, one end of resistor R5, the input end of regulator D2, the base of triode T4 connects the CONM pin of PB620 chip through resistor R4, the emitter of triode T4 is grounded, the ANA pin of PB620 chip connects one end of capacitor C2 and one end of resistor R15 respectively, the other end of capacitor C2 connects one end of reference ground and one end of resistor R12 respectively, the other end of resistor R12 connects the other end of resistor R15 and the collector of triode T6 respectively, the emitter of triode T6 connects one end of resistor R5 respectively through resistor R11, the OUT pin of regulator 317, one end of resistor R7, the other end of resistor R1, the one end of resistor D1, the one end of resistor R5 and the other end of resistor R9 of resistor R5 connect the base of the triode T2 and one end of resistor C2, the output end of the resistor R10 of the triode 620 chip connects one end of the common resistor C2 and one end of the base of resistor C9 and the resistor R9 respectively, the other end of the base of the resistor C2 and the resistor R9 of the resistor C3 and the other end of the resistor R3 and the resistor R5 connect the common base of the resistor C3 and the other end of the resistor R9.
Preferably, the power tube Q1 includes a power tube Q1A and a power tube Q1B connected in parallel, where a source of the power tube Q1A is connected to a source of the power tube Q1B and a v+ pin of the EV620 circuit board, a drain of the power tube Q1A is connected to a drain of the power tube Q1B and an l+ pin of the EV620 circuit board, a gate of the power tube Q1A is connected to one end of the resistor R2B and a BH pin of the EV620 circuit board through the resistor R2A, and another end of the resistor R2B is connected to a gate of the power tube Q1B.
Preferably, the Powerbus slave receiver circuit includes a PB331 chip, a PI pin of the PB331 chip is connected to one end of a resistor R31 and one end of a resistor R32, the other end of the resistor R32 is grounded, the other end of the resistor R31 is respectively connected to a collector of a triode T11, an anode of a diode D11, and an anode of a rectifier bridge MB6S, a cathode of the diode D11 is respectively connected to one end of a capacitor C31 and a DCS port, and is used as a power supply output interface of the Powerbus slave receiver, the other end of the capacitor C31 is grounded, a base of the triode T11 is connected to a PD pin of the PB331 chip through a resistor R34, an emitter of the triode T11 is grounded through a resistor R33, an anode of a rectifier bridge MB6S is grounded, an ac end of the rectifier bridge MB6S is connected to the Powerbus through a fuse F2, and a bidirectional TVS tube is connected in parallel between the rectifier bridge MB6S and the Powerbus.
Basic functions of the system:
(1) Real-time on-line monitoring: monitoring the comprehensive operation condition of the central controller, and opening, short-circuiting and connecting states of a loop of a system power supply and communication network; and monitoring the working and fault conditions of the communication power distribution controller and the intelligent control terminal equipment.
(2) And (3) intelligent control: the basic working mode of the intelligent direct current power supply terminal equipment can be set remotely through the central controller, the multifunctional direct current power supply terminal switch can be controlled automatically or manually, and various switches and conversions are realized according to control software programs.
(3) USB charging management: output voltage: 4.5V-5.5V, and outputting current: 2A, USB port charging employs a "quick charge" mechanism.
(4) And (3) intelligent power supply output: the intelligent power output end of the system control terminal module can provide power for realizing various switching and conversion modes according to control software programs and can be connected with other direct-current 5V electric equipment.
System monitoring function:
the system has a self-checking function, the central controller can automatically monitor the working states and fault conditions of system equipment and software such as a signal machine, a power supply, a communication link, a detector and the like, the states of the system and the equipment can be displayed in a control center, and an alarm or a prompt can be sent out when the system and the equipment cannot work normally. All fault information and other operational errors or event occurrences should be recorded in the system log.
System remote monitoring and maintenance function:
the system is connected with a system maintenance center (user authorization) through a remote networking mode such as GPRS, WIFI, 4G or 5G wireless network and the like by an Internet remote management platform based on a BS architecture, and the system is remotely maintained and controlled by the system maintenance center. The operation of the monitoring system is realized as the same as the operation of the local system control console; setting system control parameters; and modifying and upgrading the system software.
Compared with the prior art, the invention has the beneficial effects that:
the intelligent control system of the direct current power supply system of the stadium seat USB charging port monitors the comprehensive operation condition of the central controller of the direct current power supply system of the stadium seat USB charging terminal through a real-time online monitoring technology; open circuit, short circuit and connection state of the system power supply and communication network; communication distribution controller, intelligent control terminal equipment's work and fault condition. The basic working mode of the intelligent direct current power supply terminal equipment can be set remotely through the central controller, the multifunctional direct current power supply terminal (seat USB charging port) can be automatically or manually controlled to be turned on and off, and various switches and conversions are realized according to control software programs. The output charging of the seat USB charging port adopts a quick charging mechanism. The intelligent control terminal module of the system intelligently controls the power output end through the human body detection unit and the sensing information input unit, can provide power for realizing various switching and conversion modes according to control software programs, and can be connected with other direct-current 5V electric equipment.
The system adopts a power supply bus technology based on Powerbus low-voltage direct current carrier waves, meets the requirements of equipment power supply and communication by modulating control signals on a power supply cable, replaces the traditional separated control cable and power supply cable, greatly improves communication stability, provides high communication anti-interference capability, can adapt to various wires used on site and laid in any topology mode, realizes the function of remote communication, is greatly convenient for construction wiring, can prevent misconnection, and simplifies construction maintenance. Compared with an RS-485 four-wire system (two power supply lines and two communication lines), the technology of sharing one bus by combining the power supply line and the signal line is realized, and due to the performance of the nonpolar wiring arbitrary topology, the system faults caused by arbitrary crossing and wiring errors of buses in the construction of thousands of seat USB charging ports of stadiums are avoided, so that the design, construction, debugging and maintenance of the seat USB charging port direct current power supply system of the stadiums are simplified and easy.
Drawings
FIG. 1 is a block diagram of a stadium seat USB charging port intelligent control system;
FIG. 2 is a schematic diagram of a DC power supply system management platform);
FIG. 3 is a schematic diagram of a DC power domain monitor host;
FIG. 4 is a schematic diagram of a communication distribution controller;
FIG. 5 is a schematic diagram of a communication distribution controller;
FIG. 6 is a schematic diagram of an intelligent control terminal module;
FIG. 7 is a schematic diagram of the technical principle of the intelligent control terminal module;
FIG. 8 is a schematic diagram of a Powerbus master station controller wiring;
fig. 9 is a basic application circuit diagram of the Powerbus master station controller;
fig. 10 is a schematic diagram of a core circuit board EV620 (daughter board) of the Powerbus master station controller;
FIG. 11 is a schematic diagram illustrating the transmission of 8-bit serial data from a UART communication interface;
FIG. 12 is a schematic diagram of a UART communication interface 9-bit serial data transmission;
FIG. 13 is a schematic diagram of a parallel MOSFET and PB620 circuit connection;
FIG. 14 is a graph showing unidirectional TVS characteristics and clamping voltage effects;
FIG. 15 is a schematic diagram of a Powerbus slave receiver wiring;
fig. 16 is a basic application circuit diagram of a Powerbus slave receiver;
FIG. 17 is a schematic diagram of a Powerbus slave receiver connected to a DC load connection;
FIG. 18 is a diagram of PB331 core circuit power;
FIG. 19 is a plan view of a stadium seat USB charging port intelligent control system of the present invention;
fig. 20 is a schematic diagram of the intelligent control terminal module wiring.
Detailed Description
In order to make the invention more comprehensible, preferred embodiments accompanied with figures are described in detail below.
As shown in fig. 1, the communication control layer structure of the intelligent control system for the USB charging port of the stadium seat is 4-level: the central management/control stage, the regional control stage, the distribution route control stage and the intelligent control terminal control the corresponding direct-current power supply system management platform, the direct-current power supply regional monitoring host, the communication distribution controller and the intelligent control terminal module. The system ladder power supply structure is divided into 2 stages: an AC-DC conversion buck stage and a DC-DC safety voltage stage.
1. The direct-current power supply system management platform comprises:
the technical structure diagram of the direct current power supply system management platform (central controller) is shown in fig. 2, the direct current power supply system management platform consists of a central controller (DCMS), an industrial network switch, an optical fiber transceiver and the like, an OPC industrial standard data interface which is interconnected and communicated with an intelligent integrated platform of a weak current system or a BA system is provided, the interface is accessed into the internet through a firewall to realize data butt joint with an upper data center, and the direct current power supply system management platform has an intuitive man-machine operation interface and can facilitate control and editing of system equipment.
The central controller adopts an industrial control computer, and has good stability and high reliability. Industrial control computers require the use of industrial grade computers, serial communication interfaces and network interfaces to exchange information with external systems.
The software system of the central controller consists of editing software, management software and a protocol analysis module. The editing software consists of a graphic editing module and a plan editing module; the management software consists of a management module and a communication module.
(1) Editing software: and finishing editing of information required by normal operation of the system. The graphic editing module realizes the functions of editing the layer, adding and deleting equipment on the layer, setting information of the equipment and the like; the plan editing module adopts a graphic mode and a code mode to realize emergency plan information editing and plan information editing functions;
(2) Management software: and finishing the control of the related equipment and the viewing of the related information. The communication module realizes the functions of collecting equipment information, downloading equipment control commands and the like. The management module realizes the functions of setting basic information of the system, checking related information in the system, issuing commands for controlling equipment and the like.
(3) Protocol analysis module: and the analysis function of the communication protocol between the central controller (DCMS) and the direct current power supply area monitoring host (QC) is completed.
Main technical parameters of central controller (DCMS):
(1) The direct-current power supply intelligent management system is provided with a building plan display and an audience information mark;
(2) A manager monitors and manages the system through a direct-current power supply system management platform in a central monitoring room;
(3) Adopting a full Chinese graphical operation interface;
(4) The system has the functions of alarm management, schedule, history record, password protection, chinese menu and graphical multifunctional programming software;
(5) The control area and the operation management authority can be flexibly and conveniently set according to the needs;
(6) The state of all direct current power supply system equipment can be detected, and the system can be ensured to run without faults;
(7) The stability of the monitoring software is not affected when the temperature of the normal environment changes or the monitoring software runs for a long time;
(8) The central monitoring software can monitor the operation and state of the intelligent terminal equipment unit and realize functions;
(9) The preset test is automatically completed, and the test result can be intuitively reflected;
(10) The data storage time related to the system operation is more than 5 years;
(11) When the power supply circuit and the intelligent terminal equipment unit have the function faults, fault data can be printed out in real time, and the data can be selected through the function operation;
(12) The system can be programmed and set, and the system functions are configured;
(13) Fault information of any component equipment in the system can be obtained;
(14) The intelligent terminal equipment unit with faults can be positioned and displayed intuitively through color change.
2. Direct current power supply area monitoring host:
the technical structure diagram of the direct current power supply area monitoring host (QC) is shown in fig. 3, and the working state of each lower-layer device can be monitored in real time, so that the system has the functions of fault and event reporting. The direct-current power supply area monitoring host (QC) is connected to an industrial network switch of a direct-current power supply system management platform (DCMS) upwards through an optical fiber transceiver, and is connected with a communication power distribution controller (TPC) downwards in a communication bus mode.
Technical constitution and specification parameters of a direct current power supply area monitoring host (QC):
(1) The communication line adopts CAN, modBus, lonBus bus with high stability and long transmission distance. The communication distribution controller is connected with the intelligent direct-current power supply terminal module in a two-bus communication mode.
(2) The direct current power supply area monitoring host (QC) adopts a high-reliability industrial control computer and an embedded operating system. Using no less than 7 inches below the color display; and displaying Chinese characters.
(3) Input power, AC220V,50HZ.
(4) The protection level is not lower than IP30.
(5) Use environment: the temperature is between-10 ℃ and 55 ℃ and the relative humidity is less than or equal to 95 percent RH.
(6) External communication: the direct current power supply area monitoring host (QC) is provided with a 2-standard serial interface (RS-485), a CAN bus and an optical fiber communication interface.
The main functions of the direct current power supply area monitoring host (QC) are as follows:
(1) The system can monitor the working state of each device in the system in real time, and has the functions of uninterrupted inspection and active fault alarm.
(2) And monitoring the fault states and fault occurrence time of all the devices in the system, inquiring, recording and printing information in real time, and sending out audible and visual alarms.
3. Communication distribution controller:
the communication power distribution controller (TPC) mainly completes the upper protocol and lower communication route and the link modulation of communication data and power supply. The technical structure diagram of the communication distribution controller is shown in figure 4.
The communication power distribution controller (TPC) consists of a communication routing unit, a communication signal modulation unit, an output control unit, an AC/DC switching power supply, a miniature circuit breaker and the like. The technical principle schematic diagram of the communication power distribution controller (TPC) is shown in fig. 5, the input part of the communication power distribution controller (TPC) is a communication bus (RVS-2×1.5) and an AC220 input power cable (WDZ-BYJ-3×2.5), and the power supply bus technology of the low-voltage direct-current carrier wave through the Powerbus adopts the Powerbus master station controller to combine the power supply line and the communication signal line into one, so that the technology that the communication signal and the power supply of the output part share one bus is realized. The number of output loops of the communication power distribution controller (TPC) is 4 (WLE 1-WLE 4), and WDZ-BYJ-2X 4 cables are adopted. A communication routing unit of an input part of the communication power distribution controller (TPC) and a direct current power supply area monitoring host (QC) are provided with communication interfaces with corresponding specifications, and an RS-485 communication interface can be selected. The input voltage of the communication power distribution controller (TPC) is AC220V, the loop voltage of the output power supply buses (WLE 1 to WLE 4) is DC24V, and the power supply buses laid on the periphery of the stadium seat are ensured to be safe voltages.
Main technical parameters of the communication power distribution controller (TPC):
(1) The device consists of an input unit, a communication module, a power module, an output and communication control module and the like.
(2) Each regional distribution box is provided with an independent address code.
(3) The input voltage is AC220V and the output voltage is DC24V.
(4) The number of output loops of the communication distribution controller is limited to 4 at most.
(5) Each circuit of the power supply and the communication output has a protection function of short circuit and open circuit.
(6) Each loop failure of the power supply and communication output does not affect other loop communications and power.
(7) The intelligent control terminal module can receive the instruction of the system controller and control the intelligent control terminal module to work.
(8) The communication distribution controller can be arranged in a distribution interlayer of a stadium area.
(9) The installation mode is as follows: wall-mounted installation.
(10) Use environment: the temperature is between-10 ℃ and 50 ℃ and the relative humidity is less than or equal to 95 percent RH.
(11) Protection grade: not less than IP33; has the measures of dampproof, waterproof, etc.
4. And the intelligent control terminal module:
the intelligent control terminal module (ZM) is divided into two-position (ZM/2D) and unit (ZM/1D) 2 specifications, and is configured according to the actual requirements of stadium seats. The intelligent control terminal module (ZM) is composed of a Powerbus slave receiver, a bus communication IO intelligent control unit, a USB charging module, a human body detection unit, an intelligent power output unit, a sensing information input unit and the like. The intelligent control terminal module (ZM) realizes the functions of information acquisition and output management. The technical structure diagram of the intelligent control terminal module is shown in fig. 6, and the technical principle schematic diagram of the intelligent control terminal module (ZM) is shown in fig. 7. The power supply output interface of the Powerbus slave station receiver is connected with the power supply input interface of the bus communication IO intelligent control unit, DC24V voltage is controlled and output through the power supply intelligent output interface of the bus communication IO intelligent control unit, and the DC24V voltage is used as the input of the USB charging module to realize USB charging through voltage transformation output; the communication signal output interface of the Powerbus slave receiver is connected with the communication input interface of the bus communication IO intelligent control unit, and is connected with the human body detection unit and the sensing information input unit through the information acquisition output interface of the bus communication IO intelligent control unit.
Main technical parameters of intelligent control terminal module (ZM):
(1) Working environment: outdoor open air environment.
(2) Ambient temperature: -20-80 ℃.
(3) Protection grade: IP66.
(4) Input power: DC24V is powered using a Powerbus power bus (signal and power share a bus).
(5) The communication mode is as follows: the Powerbus power bus (a bus shared by both signal and power) is used for communication.
(6) USB charging port of USB charging module:
USB port charging employs a "fast charge" mechanism.
Input voltage: DC24V
Output voltage: 4.5V-5.5V, and outputting current: 2A.
(7) The USB charging module supports a plurality of USB charging protocols, and each charging protocol is automatically switched.
Divider1/Divider2/Divider3 charging protocol.
D+/D-put into 1.2V mode.
BC1.2 DCP and CTIS YD/T1591-2009 charging protocol.
Basic functions of the intelligent control terminal module (ZM):
(1) Each intelligent control terminal module has a unique communication address.
(2) The intelligent control terminal module can execute the functions of opening, closing and the like of the controller instruction.
(3) USB charge management may be performed and a fast charge output port may be provided.
(4) The power output port of the intelligent control mode can be provided according to the main control instruction.
5. Powerbus power bus:
the Powerbus low-voltage direct-current carrier power supply bus is a technology which combines a power supply line and a signal line into a whole relative to an RS-485 four-wire system (two power supply lines and two communication lines), realizes that the signal and the power supply share one bus, and avoids wiring errors in construction due to the performance of nonpolar wiring arbitrary topology, so that the construction design is simplified and easy.
The Powerbus power supply bus improves the traditional application of the traditional RS-485 bus aiming at the defect of construction design of the RS-485 bus, has the advantages of no polarity wiring, arbitrary topology, no need of isolation, long communication distance and the like, and the Powerbus communication protocol accords with the Modbus communication protocol, thereby simplifying construction design. The power bus performance comparison is shown in table 1. The Powerbus two-wire system power supply bus technology adopts a TDMA communication technology to realize power supply and communication at the same time, has the characteristics of power supply, communication, nonpolar wiring and the like, and comprises a master station controller and a slave station receiver. The bus protocol solution based on network transmission is more mature and has two types of EtherCAT and PowerLink, and Powerbus is different from the two types of protocol, has the functions of the two types of protocol, and is superior to the two types of protocol in certain indexes.
TABLE 1
Powerbus power bus technical characteristics:
high-speed communication: the bus can supply power, and the furthest communication distance can reach 3000 meters.
High power: the bus may provide 20A current and a single slave may provide 1A current.
Non-polar wiring: the wiring is nonpolar, so that the installation and debugging time is saved.
Arbitrary topology: the star, tree and bus type are supported, and the wiring is more random.
The slave station may be hooked 256: the communication of more than 256 nodes can be stabilized without being influenced by equipment.
Wiring mixed-running: the wiring can be mixed with AC220V without separate piping.
Flexible wiring: any cable, twisted pair, BV wire.
The cost is saved: and electrical isolation is not needed, so that the cost is greatly reduced.
Anti-interference: excellent anti-interference capability, and EMC compatibility without a magnetic ring.
Simple and easy to use: the serial UART transparent transmission is compatible with manual and simple application on MODBUS protocol.
Low configuration: no requirement on load and no limitation on current fluctuation.
Easy expansibility: the extended distance, power and number of secondary stations can be flexibly relayed.
Powerbus power bus technical index:
the bus may be powered, and communication and power may not need to be electrically isolated.
Communication rates 9600bps and 2400bps half duplex communication are supported.
Bus current 20A (2400 bps) may be supported.
The bus short circuit protection is provided, and the bus is automatically recovered after the short circuit is removed.
And a fault signal reporting function.
256 devices can be simultaneously hung.
The communication distance can reach 3000m.
The slave station supports non-polar wiring.
Support arbitrary topology wiring: tree, star, bus.
The maximum bus voltage may be up to 48V.
Half duplex communication is employed.
Operating temperature: -40 to +85℃.
5.1, powerbus master station controller technical description:
powerbus belongs to the low voltage power bus technology. By modulating the control signal on the power supply cable, the traditional separated control cable and power supply cable are replaced, and the communication stability is greatly improved. The Powerbus adopts a full-amplitude voltage transmission mode and a current signal return mode, so that high communication anti-interference capability is provided. Can be suitable for various wires used on site and realize the function of remote communication. The cable can be laid in any mode such as bus type, tree type or star type, is greatly convenient for construction wiring, can prevent misconnection from happening, and simplifies construction maintenance. The power management function can be provided for the Powerbus bus, and power supply, communication and fault monitoring of the bus are realized. The Powerbus master controller core chip employs an advanced SOC architecture that provides up to 20A of on-line current support at 2400 bps. High performance, low cost, high anti-interference capability and long-line performance with remarkable advantages.
The Powerbus master station controller is technically characterized in that:
the bus may be powered, communication and power may not require electrical isolation.
The bus has strong anti-interference capability and can be used together with the mains supply.
Bus current 20A (2400 bps) may be supported.
With bus short protection, the short removal automatically restores the bus.
Fault signal reporting function.
256 devices can be hooked up simultaneously.
Communication distance can reach 3000m.
Support non-polar wiring.
Support arbitrary topology routing: tree, star, bus.
No special cable requirements.
The maximum bus voltage may be up to 48V.
The isolated RS485 and RS232 interfaces and the transparent serial port protocol can be compatible with the original RS-485 and RS-232 systems.
Communication rates 9600bps and 2400bps half duplex communication are supported.
Perfect surge and EMC design, guaranteeing electromagnetic compatibility characteristics.
A schematic diagram of the Powerbus master station controller wiring is shown in fig. 8. The system has the RS232 and RS485 interfaces, and can be conveniently built for testing. Or the serial port conversion module is used for carrying out communication test by using a serial port assistant of the computer. The power device and the heat sink are provided, the power device and the heat sink stably support 20A bus power, have complete state indication, surge protection and EMC design, have isolated RS485 and RS232 interfaces, support 48V of maximum bus voltage, have a furthest communication distance of 3000m and have no special cable requirements.
As shown in fig. 9, EV620 is a core circuit board of the Powerbus master station controller, and the core circuit board is a single-sided layout, and has no devices on the back side. The power bus master station controller can be used as a daughter board and is directly welded on a main board of the power bus master station controller.
The Powerbus bus master station controller circuit comprises a power supply, an EV620 circuit board, a fuse F1, a power tube Q1, a triode Q2, a triode Q3, a capacitor C11, a resistor R12, a resistor R13 and a unidirectional TVS tube, wherein the power supply is respectively connected with one end of the capacitor C11 through the fuse F1, the source electrode of the power tube Q1 and the V+ pin of the EV620 circuit board, the other end of the capacitor C11 is grounded, the grid electrode of the power tube Q1 is connected with the BH pin of the EV620 circuit board through the resistor R12, the drain electrode of the power tube Q1 is respectively connected with one line of the L+ pin of the EV620 circuit board, the emitter electrode of the triode Q3, one end of the resistor R11, the cathode of the unidirectional TVS tube and the Powerbus bus, the collector electrode of the triode Q3 is respectively connected with the BL pin of the EV620 circuit board and the base electrode of the triode Q2, the base electrode of the triode Q3 is respectively connected with the other end of the resistor R11 and the emitter electrode of the triode Q2 through the resistor R13, the positive electrode of the triode Q2 and the unidirectional TVS tube is respectively connected with the other line of the Powerbus 620 and the collector of the Powerbus bus.
As shown in fig. 10, PB620 is a core chip on the core circuit board EV620 of the Powerbus master station controller, and the Powerbus master station controller EV620 (daughter board) is directly soldered to the motherboard of the Powerbus master station controller. The HP pin of the PB620 chip is connected with the BAUD pin of the EV620 circuit board, the BRK pin is connected with the BRK pin of the EV620 circuit board, the COHN pin is connected with the base electrode of the triode T1, the emitter electrode of the triode T1 is grounded through a resistor R2, the collector electrode of the triode T1 is respectively connected with one end of the resistor R1, the base electrode of the triode T2 and the base electrode of the triode T3, and the collector electrode of the triode T2 is respectively connected with the other end of the resistor R1 and the V+ pin of the EV620 circuit board; the collector of the triode T3 is grounded, the emitter of the triode T2 is respectively connected with the emitter of the triode T3, one end of the resistor R3 and one end of the capacitor C1, and the other end of the resistor R3 is respectively connected with the other end of the capacitor C1 and a BH pin of the EV620 circuit board; the 3V3 pin of PB620 chip connects capacitor C4 and one end of capacitor C15 respectively, the other end ground of capacitor C4 connects reference ground and the OUT pin of LDO respectively, the GND pin of LDO is grounded, the IN pin of LDO connects the VCC end of EV620 circuit board and the IN pin of regulator LM317 respectively, the ADJ pin of regulator LM317 connects one end of resistor R6 respectively, the collector of triode T4, one end of resistor R5, the input end of regulator D2, the base of triode T4 connects the CONM pin of PB620 chip through resistor R4, the emitter of triode T4 is grounded, the ANA pin of PB620 chip connects one end of capacitor C2 and one end of resistor R15 respectively, the other end of capacitor C2 connects one end of reference ground and one end of resistor R12 respectively, the other end of resistor R12 connects the other end of resistor R15 and the collector of triode T6 respectively, the emitter of triode T6 connects one end of resistor R5 respectively through resistor R11, the OUT pin of regulator 317, one end of resistor R7, the other end of resistor R1, the one end of resistor D1, the one end of resistor R5 and the other end of resistor R9 of resistor R5 connect the base of the triode T2 and one end of resistor C2, the output end of the resistor R10 of the triode 620 chip connects one end of the common resistor C2 and one end of the base of resistor C9 and the resistor R9 respectively, the other end of the base of the resistor C2 and the resistor R9 of the resistor C3 and the other end of the resistor R3 and the resistor R5 connect the common base of the resistor C3 and the other end of the resistor R9.
The Powerbus master station controller has the following functions:
(1) High power mode
HP is the high power mode switching pin, and the inside is equipped with pull-up resistor. This pin is used to select the mode of operation and the communication rate. This pin is either left empty or pulled high: UART communication rate is 9600bps, and supporting bus current is 5A. Grounding this pin, entering a high power mode: UART communication rate is 2400bps, and can support maximum bus current of 20A.
(2) Bus supply voltage with wide range selection
The Powerbus master station controller belongs to a low-voltage direct-current power supply bus and supports 12-48V of bus voltage direct current. The bus voltage was DC24V according to stadium requirements. From the range of station voltage requirements, wire voltage losses. Usually no different from dc supply lines. An external AC/DC direct current switching power supply is connected between V+ and GND.
(3) UART communication interface
The Powerbus master station controller supports standard serial port timing data. The receiving and transmitting self-adaptive support 8-bit 9-bit data mode, and the 9 th bit can be a data bit, a check bit and an address bit. 8-bit serial data, start bit+8-bit data bit+stop bit, as shown in FIG. 11. The 9-bit serial data is a start bit, 8-bit data bit, 9-th data bit and stop bit, as shown in fig. 12.
(4) MOSFET (Metal-oxide-semiconductor field Effect transistor) selection and heat power consumption calculation
In fig. 9, Q1 is a bus power MOSFET, and a power MOSFET is selected.
The P-MOSFET driving circuit in FIG. 9 provides power control for driving the P-MOSFET, driving voltage V gs Is 0-11V, V is selected gs P-MOSFET with voltage resistance above 20V.
The MOSFET is selected based on bus current and heat.
R DS(on) The parameter is MOSFET on-resistance, lower R DS(on) Lower but typically also more expensive, the heat dissipation by the MOS:
P D ＝IR DS(on)
parallel MOSFETs to reduce heat: in order to reduce the heat productivity, two MOSFETs may be connected in parallel, as shown in fig. 13, the power tube Q1 adopts a power tube Q1A and a power tube Q1B connected in parallel, the source of the power tube Q1A is respectively connected to the source of the power tube Q1B and the v+ pin of the EV620 circuit board, the drain of the power tube Q1A is respectively connected to the drain of the power tube Q1B and the l+ pin of the EV620 circuit board, the gate of the power tube Q1A is respectively connected to one end of the resistor R2B and the BH pin of the EV620 circuit board through the resistor R2A, and the other end of the resistor R2B is connected to the gate of the power tube Q1B. R1A and R2B should be placed close to the GATE pin of the MOSFET. After parallel connection, each MOSFET bears half of the current, heat loss PD is reduced to one fourth, and temperature rise is one fourth.
In a specific Powerbus master controller motherboard application, the design power 20A is connected in parallel (e.g., Q1 and Q2 in FIG. 11) using two MOSFETs IRF4905PBF with an on-resistance of 20m_ @ 10V. When 20A is fully loaded, the total power taken on the two MOSFETs: p=i 2 R mos =400×0.01=4w, each MOSFET bears heat 2W.
(5) Protection function
1) Short circuit protection
The Powerbus master station controller is provided with a complete bus fault detection mechanism. When the bus is in an on-line short circuit, PB620 can immediately turn off the bus, prevent line accidents, and protect the power devices of the master station from damage. The BRK (Pin 20) Pin of PB620 outputs a high level (3.3V typical value) when the bus is normal, and this signal can be used for processing the report signal or for switching the relay or LED indicator signal. After the bus short occurs, the BRK pin will output a low level. When the short circuit is removed, the PowerBus bus is automatically turned on and the BRK pin high level is restored.
The onboard fuse of the main board of the Powerbus master station controller is 20A, and if the input power is connected reversely or exceeds the rated load, the fuse may be burnt. Such as burning a fuse or requiring other current thresholds, replacing the fuse.
When the bus is shorted, the L+ indicator light on the board of FIG. 11 will go off and the BRK indicator light will go on. After the short circuit is removed, the bus automatically recovers.
2) Overvoltage protection
The maximum input voltage of the Powerbus master station controller is 48V.
The surge protection Z3 on the output line provides power supply overvoltage protection: the power input terminal Z3 in fig. 11 is a unidirectional transient suppression diode 5KP48A. For suppressing on-line surges. The use of unidirectional, reverse negative voltage is prevented from damaging the on-board device.
3) Reverse connection protection for power supply
Z4 provides power reverse protection: z4 in fig. 11 is the unidirectional transient suppression diode 5KP48A. Is used for preventing the accidental reverse connection of the power supply. The high current will go forward through 5KP48A, blowing the on-board fuse F1 (20 AFUSE) and cutting off the power supply.
4) Surge protection
In the application environment of a direct current power supply system of a stadium seat USB charging port, electronic equipment needs to bear a wide input voltage from a relay, a load dump pulse of an electromagnetic switch and reverse polarity. Thus, the system configures external transient absorption (zener diode or TVS).
In order to meet the requirements of electromagnetic compatibility characteristic standard of electronic and electric products such as Surge Immunity (Surget Immunity), electric fast pulse group (EFT) and electrostatic discharge (ESD), a protection device of 1500W (SMCJXXA) is selected. Surge protection meeting standard GB/T17626.5 (10/1000 uS,20/80uS, ±1000V).
For better absorbing negative pulses and harassments in EMC tests and preventing reverse negative voltages generated by inductive loads on long lines, port protection is facilitated, and unidirectional TVS protection devices are selected to be used.
When the TVS clamping voltage is selected to be not smaller than the bus V bus Operating voltage so as not to affect bus operation but high breakdown voltage V BR TVS of (1) reaches I pp The clamping voltage is also higher, and the maximum reverse operating voltage V is chosen for better protection of the components on the board R ＝100％～120％ V bus . The TVS characteristics and clamp voltage effects are shown in fig. 14.
5.2, powerbus bus slave receiver technical description:
the Powerbus slave station receiver adopts low-voltage power supply bus technology, and the requirements of power supply and communication of equipment can be met through the Powerbus. By modulating the control signal on the power supply cable, the traditional separated control cable and power supply cable are replaced, and the communication stability is greatly improved. The Powerbus adopts a voltage transmission and current signal feedback mode, and provides high communication anti-interference capability. Can be suitable for various wires used on site and realize the function of remote communication. The cable can be laid in any mode such as bus type, tree type or star type, is greatly convenient for construction wiring, can prevent misconnection from happening, and simplifies construction maintenance.
The Powerbus slave station receiver transmits the master station UART signal, and can be compatible with TTL communication levels of 3.3V and 5V. The UART serial port of the slave MCU can be directly connected to carry out equipment communication test. And a UART-USB module can be used, so that the computer can be conveniently connected to perform code sending and code returning test. The Powerbus slave receiver may provide a maximum power output of 1A and may step down to the voltage required by the device to power the device. And the communication test can also be carried out with a dummy load.
The Powerbus bus slave station receiver is technically characterized in that:
the bus may be powered, communication and power may not require electrical isolation.
The bus has strong anti-interference capability and can be used together with the mains supply.
256 devices can be hooked up simultaneously.
Communication distance can reach 3000m.
Support non-polar wiring.
Support arbitrary topology routing: tree, star, bus.
No special cable requirements.
The maximum bus voltage may be up to 48V.
RS-485 system of transparent serial protocol.
Adaptive 9600bps and 2400bps half duplex communications.
TTL communication level compatible with 3.3V and 5V.
Serial communication with isolation design, ensuring electromagnetic compatibility and being compatible with an additional power supply system.
Maximum 1A supply power may be provided for the substation or load.
Low cost solutions.
A Powerbus slave receiver wiring schematic is shown in fig. 15. And correctly connecting the target communication bus communication IO intelligent control unit, the MCU or the TTL TO USB module TO a TTL interface in the figure. And the same TTL communication level is selected and connected to the MCU_3V3 or MCU_5V input to supply power to the isolation side. The DC OUT power output interface is connected to a target load. The Powerbus LINE IN interfaces to the Powerbus two-wire bus. And opening the upper bus to perform communication debugging and opening.
The basic application circuit of the Powerbus slave receiver is shown in fig. 16. PB331 is the core chip of Powerbus bus slave receiver, the one end of resistance R31 and the one end of resistance R32 are connected to the PI foot of PB331 chip, the other end ground connection of resistance R32, triode T11 ' S collecting electrode is connected respectively to the other end of resistance R31, diode D11 ' S positive pole, rectifier bridge MB6S ' S positive pole, capacitor C31 ' S one end and DCS port are connected respectively to diode D11 ' S negative pole, as the power supply output interface of Powerbus bus slave receiver, capacitor C31 ' S other end ground connection, PB331 chip PD foot is connected through resistance R34 to triode T11 ' S base, triode T11 ' S projecting pole ground connection through resistance R33, rectifier bridge MB6S ' S negative pole ground connection, rectifier bridge MB6S AC end is connected the Powerbus through fuse F2, connect in parallel to have two-way TVS pipe between rectifier bridge MB6S and the Powerbus.
(1) Power supply for a load
The load power supply can be obtained from the DCS port of fig. 16, and the port voltage can be used as a normal DC power supply line, and can be reduced in voltage to supply to a low-voltage system (a USB charging module for DC24/DC5V conversion), or used for load carrying.
(2) Load demand
The Powerbus bus is an intelligent low-voltage power supply two-bus, and the load can be any load: resistance, susceptibility. The load may be; motor, stepper motor, electrothermal actuator, relay and high-power LED. The dynamic change of load current does not affect communication. The dc load connection is shown in fig. 17.
(3) Core circuit power supply
PB331 is a wide power supply range, and LDO or DC/DC step-down can be used. The power supply system can be shared with an MCU (bus communication IO intelligent control unit). The power supply can be supplied from a bus or can be reduced in voltage from a standby battery or other external mains supply. As shown in fig. 18. In actual use, a bus power supply mode is adopted.
(4) Protection function
1) Short circuit protection
FUSE in the Powerbus slave receiver basic application circuit (fig. 16) is a recoverable FUSE PPTC. Acting to prevent short circuits and reduce power-on shock. If a secondary station fails to become shorted, the FUSE can disengage the secondary station from the bus without affecting the bus and other secondary stations. The primary station can detect this failure by inspection.
The Powerbus slave receiver may output a maximum 1A current when the particular Powerbus slave receiver is in use. The F2 on the board is 900mA recoverable fuse. If the current exceeds 900mA for a long time, the current is limited by F2. If the secondary station is shorted by accident. F2 will limit the maximum current of the slave, the protection device F2 may also use a resistor, which will blow if the slave becomes shorted due to any damage, thus disconnecting the slave without affecting the bus. The upper computer (MCU) can easily find out the fault slave station through communication inspection.
2) Overvoltage protection
The bus input voltage of the Powerbus slave receiver cannot exceed 50V, and a bidirectional 48V transient suppression diode is used to protect the on-line surge and limit the input voltage.
3) Surge protection
A bidirectional transient current suppressing diode is used to suppress the surge from the line.
The device model selection and configuration method of the direct current power supply system of the stadium seat USB charging port are shown in table 2. The system mainly comprises a direct current power supply system management platform (DCMS), a direct current power supply monitoring host (QC), a communication power distribution controller (TPC), a double-position intelligent control terminal module (ZM/2D), a unit intelligent control terminal module (ZM/1D), an equipment input power line, a terminal power supply and communication line, a field communication bus, a control communication network line, a control network optical fiber and the like.
6. The configuration method of the direct-current power supply system of the stadium seat USB charging port comprises the following steps:
(1) Intelligent control terminal module (ZM): the intelligent control system is divided into a double-position intelligent control terminal module (ZM/2D) and a unit intelligent control terminal module (ZM/1D), and is installed in a wall-mounted mode. Configured according to the actual number and requirements of seats in the stadium. The number of bits of the intelligent control terminal module (double bits) is 2, and the number of bits of the intelligent control terminal module (unit) is 1. The number of output loops of each communication distribution controller is limited to be at most 4 (WLE 1-WLE 4), communication efficiency (communication baud rate is recommended to 2400bps when high current is applied) is mainly considered, and the number of intelligent control terminal modules is limited to be at most n=8 when each output loop is limited. The maximum defined point number of bits is: n×4×40×2×m (8×4×40×2×m). The number m of the direct current power supply monitoring hosts can be determined according to the actual dot number and the bit number requirement. Assuming that the number of points of the intelligent control terminal module (double-position) is a, the number of points of the intelligent control terminal module (unit) is a, and the estimation method comprises the following steps: m= (a×2+b×1)/(8×4×40×2). The number of communication power distribution controllers (TPCs) can be estimated at the same time: 40X 2X m.
(2) Communication power distribution controller (TPC): each direct-current power supply monitoring host comprises 2 paths of field communication buses, and each path of communication bus can be provided with at most 40 communication power distribution controllers. And estimating configuration according to the number of points and the number of bits of the intelligent control terminal module (ZM). And (5) wall-hung installation.
(3) Direct current power supply monitoring host (QC): and estimating configuration according to the number of points and the number of bits of the intelligent control terminal module (ZM). Is arranged in the interlayer of the area and is installed in a wall-hanging way.
(4) The system configuration 1 set of direct current power supply system management platform (DCMS) is arranged in a control room and is installed in a floor mode.
(5) And (3) a cable: according to the actual calculation, the pipe penetrating laying is the main. The equipment input power line (DWZ-BYJ-3X 2.5), the terminal power supply line (DWZ-BYJ-2X 4), the field communication bus (RVS-2X 1.5), the control communication network line (TCP/IP super five network lines) and the control network optical fiber (GYXTW single mode fiber). The terminal power supply and the wiring of a communication line (power supply bus) can be mixed with AC220V without a separate pipe.
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TABLE 2
A plan layout view (part) of the dc power supply system of the stadium seat USB charging port is shown in fig. 19. In combination with the system architecture (fig. 1), the system performs planar arrangement in a 4-level system topology from top to bottom in a hierarchical distribution:
(1) Center management/control level-direct current power supply system management platform (DCMS).
(2) Regional control level-direct current power supply monitoring host (QC).
(3) The power distribution is controlled by a control stage-a communication power distribution controller (TPC).
(4) Intelligent control terminal control-a dual-position intelligent control terminal module (ZM/2D) and a unit intelligent control terminal module (ZM/1D).
The wiring schematic diagram of the intelligent control terminal module (ZM) is shown in fig. 20. Due to the performance of the nonpolar wiring arbitrary topology of the Powerbus low-voltage direct-current carrier power supply bus, system faults caused by arbitrary bus crossing and wiring errors in construction of thousands of seat USB charging ports of stadiums are avoided, and therefore design, construction, debugging and maintenance of the seat USB charging port direct-current power supply system of the stadiums are simplified and easy.
7. The invention relates to an interface dividing method with other systems, which comprises the following steps:
the interface dividing method with stadium seat manufacturers comprises the following steps: the direct-current power supply intelligent management system provides a technical solution of a stadium seat USB charging port and coordinates an access mode with a stadium seat manufacturer. The direct-current power supply intelligent management system provides a connecting cable of a USB charging port for stadium seat manufacturers.
The interface dividing method with civil engineering comprises the following steps: and (5) reserving holes for deepening before civil construction of the total package unit and marking on a construction site.
The interface dividing method with the installation comprises the following steps: all the bridge frames (except in the weak current machine room), the wire slots and the underground room through-wall embedded sleeves related to the intelligent weak current system are borne by a total package installation unit, and the rest pipeline equipment is responsible for installation by the weak current unit. The direct-current power supply intelligent management system is used for completing data reading and wiring work of various remote meters and is matched with the open hole installation of the related meter of the total package electromechanical installation unit on a pipeline.
The interface dividing method with the grounding system comprises the following steps: the direct current power supply intelligent management system supplies and installs a grounding system in a related system and is responsible for grounding and equipotential connection of weak current system equipment in a weak current room so as to form a perfect grounding system. The general package installation unit is responsible for reserving LEB terminal boxes into weak houses.
The interface division method with BIM comprises the following steps: BIM work is carried out by matching with a general package installation unit, and the power consumption requirement of equipment is clearly shown in a deepened drawing.
The interface dividing method with the weak current system comprises the following steps: and (3) completing the system integration work required by the weak current intelligent control system of the related electromechanical equipment.

Claims (10)

1. Stadium seat USB port intelligent control system that charges, its characterized in that: the system comprises a direct current power supply system management platform, a direct current power supply area monitoring host, a communication power distribution controller and an intelligent control terminal module from top to bottom according to a communication control level, wherein the direct current power supply system management platform adopts an industrial computer, and a serial communication interface and a network interface exchange information with an external system for management and control of the whole system;
the direct-current power supply area monitoring host establishes communication connection with the direct-current power supply system management platform through the optical fiber transceiver, is used for monitoring the working state of each lower-layer device in real time and reporting faults and events to the direct-current system management platform;
the communication distribution controller is connected with the direct current power supply area monitoring host through a communication bus and a power supply line, is used for completing the upper protocol and lower communication routing, and is used for completing the link modulation of communication data and a power supply, and the power supply line and the communication bus are combined into a whole through the Powerbus master station controller, so that the communication distribution controller outputs part of communication signals and shares one bus with the power supply;
the intelligent control terminal module is connected with the output end of the communication power distribution controller through a Powerbus power supply bus, and provides a power output port in an intelligent control mode according to a main control instruction of the direct-current power supply system management platform so as to realize USB charging management;
The intelligent control terminal module comprises a Powerbus bus slave station receiver, a bus communication IO intelligent control unit, a USB charging module, a human body detection unit and a sensing information input unit; the power supply output interface of the Powerbus bus slave station receiver is connected with the power supply input interface of the bus communication IO intelligent control unit, DC voltage is controlled and output through the power supply intelligent output interface of the bus communication IO intelligent control unit, and the DC voltage is used as the input of the USB charging module to realize USB charging through voltage transformation output; the communication signal output interface of the Powerbus slave receiver is connected with the communication input interface of the bus communication IO intelligent control unit, and is connected with the human body detection unit and the sensing information input unit through the information acquisition output interface of the bus communication IO intelligent control unit.
2. The stadium seat USB charging port intelligent control system of claim 1, wherein: the direct-current power supply system management platform comprises a central controller, an industrial network switch and an optical fiber transceiver; the central controller establishes communication connection with the direct current power supply area monitoring host through the industrial network switch and the optical fiber transceiver.
3. The stadium seat USB charging port intelligent control system of claim 1, wherein: the input end of the direct current power supply area monitoring host is connected with the industrial network switch of the direct current power supply system management platform through the optical fiber transceiver, and the output end of the direct current power supply area monitoring host is connected with the communication power distribution controller through a communication bus mode.
4. The stadium seat USB charging port intelligent control system of claim 1, wherein: the communication distribution controller comprises a communication routing unit, a communication signal modulation unit, an output control unit, an AC/DC switching power supply and a miniature circuit breaker, wherein the input end of the communication routing unit is connected with the output end of the direct current power supply area monitoring host through a communication bus, the output end of the communication routing unit is connected with the output control unit through the communication signal modulation unit, and the 220V input power supply is connected with the output control unit through the miniature circuit breaker and the AC/DC switching power supply to output DC24V safety voltage.
5. The stadium seat USB charging port intelligent control system of claim 1, wherein: the intelligent control terminal module comprises a Powerbus bus slave receiver, a bus communication IO intelligent control unit, a USB charging module, a human body detection unit and a sensing information input unit, wherein the Powerbus bus slave receiver is connected with the output end of the output control unit of the communication distribution controller through a Powerbus power supply bus, a power supply output interface of the Powerbus bus slave receiver is connected with a power supply input interface of the bus communication IO intelligent control unit, DC24V voltage is controlled and output through the power supply intelligent output interface of the bus communication IO intelligent control unit, and the DC24V voltage is used as the input of the USB charging module to realize USB charging through voltage transformation output; the communication signal output interface of the Powerbus bus slave receiver is connected with the communication input interface of the bus communication IO intelligent control unit, and is connected with the human body detection unit and the sensing information input unit through the information acquisition output interface of the bus communication IO intelligent control unit.
6. The stadium seat USB charging port intelligent control system of claim 5, wherein: the intelligent control terminal module is provided with 2 specifications of a double-position intelligent control terminal and a unit intelligent control terminal.
7. The stadium seat USB charging port intelligent control system of claim 1, wherein: the Powerbus master station controller circuit comprises a power supply, an EV620 circuit board, a fuse F1, a power tube Q1, a triode Q2, a triode Q3, a capacitor C11, a resistor R12, a resistor R13 and a unidirectional TVS tube, wherein the power supply is respectively connected with one end of the capacitor C11, a source electrode of the power tube Q1 and a V+ pin of the EV620 circuit board through the fuse F1, the other end of the capacitor C11 is grounded, a grid electrode of the power tube Q1 is connected with a BH pin of the EV620 circuit board through the resistor R12, a drain electrode of the power tube Q1 is respectively connected with one line of L+ pin of the EV620 circuit board, an emitter electrode of the triode Q3, one end of the resistor R11, a negative electrode of the unidirectional TVS tube and a base electrode of the Powerbus bus, a collector electrode of the triode Q3 is respectively connected with a BL pin of the EV620 circuit board, a base electrode of the triode Q3 is respectively connected with the other end of the resistor R11 and a V+ pin of the EV620 circuit board through the resistor R13, a positive electrode of the triode Q2 and a positive electrode of the unidirectional TVS tube are respectively connected with another bus line of the Powerbus 620, and a GND circuit board is connected with another GND pin of the other bus.
8. The stadium seat USB charging port intelligent control system of claim 7 wherein: the core chip of the EV620 circuit board is a PB620 chip, an HP pin of the PB620 chip is connected with a BAUD pin of the EV620 circuit board, a BRK pin is connected with a BRK pin of the EV620 circuit board, a COHN pin is connected with a base electrode of a triode T1, an emitter electrode of the triode T1 is grounded through a resistor R2, a collector electrode of the triode T1 is respectively connected with one end of the resistor R1, a base electrode of the triode T2 and a base electrode of the triode T3, and a collector electrode of the triode T2 is respectively connected with the other end of the resistor R1 and a V+ pin of the EV620 circuit board; the collector of the triode T3 is grounded, the emitter of the triode T2 is respectively connected with the emitter of the triode T3, one end of the resistor R3 and one end of the capacitor C1, and the other end of the resistor R3 is respectively connected with the other end of the capacitor C1 and a BH pin of the EV620 circuit board; the 3V3 pin of PB620 chip connects capacitor C4 and one end of capacitor C15 respectively, the other end ground of capacitor C4 connects reference ground and the OUT pin of LDO respectively, the GND pin of LDO is grounded, the IN pin of LDO connects the VCC end of EV620 circuit board and the IN pin of regulator LM317 respectively, the ADJ pin of regulator LM317 connects one end of resistor R6 respectively, the collector of triode T4, one end of resistor R5, the input end of regulator D2, the base of triode T4 connects the CONM pin of PB620 chip through resistor R4, the emitter of triode T4 is grounded, the ANA pin of PB620 chip connects one end of capacitor C2 and one end of resistor R15 respectively, the other end of capacitor C2 connects one end of reference ground and one end of resistor R12 respectively, the other end of resistor R12 connects the other end of resistor R15 and the collector of triode T6 respectively, the emitter of triode T6 connects one end of resistor R5 respectively through resistor R11, the OUT pin of regulator 317, one end of resistor R7, the other end of resistor R1, the one end of resistor D1, the one end of resistor R5 and the other end of resistor R9 of resistor R5 connect the base of the triode T2 and one end of resistor C2, the output end of the resistor R10 of the triode 620 chip connects one end of the common resistor C2 and one end of the base of resistor C9 and the resistor R9 respectively, the other end of the base of the resistor C2 and the resistor R9 of the resistor C3 and the other end of the resistor R3 and the resistor R5 connect the common base of the resistor C3 and the other end of the resistor R9.
9. The stadium seat USB charging port intelligent control system of claim 7 wherein: the power tube Q1 comprises a power tube Q1A and a power tube Q1B which are connected in parallel, wherein the source electrode of the power tube Q1A is respectively connected with the source electrode of the power tube Q1B and the V+ pin of the EV620 circuit board, the drain electrode of the power tube Q1A is respectively connected with the drain electrode of the power tube Q1B and the L+ pin of the EV620 circuit board, the grid electrode of the power tube Q1A is respectively connected with one end of a resistor R2B and the BH pin of the EV620 circuit board through a resistor R2A, and the other end of the resistor R2B is connected with the grid electrode of the power tube Q1B.
10. The stadium seat USB charging port intelligent control system of claim 5, wherein: the Powerbus bus slave station receiver circuit comprises a PB331 chip, one end of a resistor R31 and one end of a resistor R32 are connected to a PI pin of the PB331 chip, the other end of the resistor R32 is grounded, the other end of the resistor R31 is respectively connected with a collector of a triode T11, an anode of a diode D11 and an anode of a rectifier bridge MB6S, a cathode of the diode D11 is respectively connected with one end of a capacitor C31 and a DCS port, the power output interface of the Powerbus slave station receiver is used as a power supply output interface of the Powerbus bus slave station receiver, the other end of the capacitor C31 is grounded, a base of the triode T11 is connected with a PD pin of the PB331 chip through a resistor R34, an emitter of the triode T11 is grounded through a resistor R33, the cathode of the rectifier bridge MB6S is grounded, and a bidirectional TVS tube is connected between the rectifier bridge MB6S and the Powerbus bus.
CN202010596918.2A 2020-06-28 2020-06-28 Intelligent control system for USB charging port of stadium seat Active CN111697702B (en)

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