CN203488212U - Mining general type monitoring substation - Google Patents

Mining general type monitoring substation Download PDF

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Publication number
CN203488212U
CN203488212U CN 201320504812 CN201320504812U CN203488212U CN 203488212 U CN203488212 U CN 203488212U CN 201320504812 CN201320504812 CN 201320504812 CN 201320504812 U CN201320504812 U CN 201320504812U CN 203488212 U CN203488212 U CN 203488212U
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board
mine
general type
substation
microcontroller
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CN 201320504812
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Chinese (zh)
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梁自荣
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江西汇弘信息技术有限公司
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Abstract

A mining general type monitoring substation is formed by a power supply module, a battery group, a main control board, a serial port server board, a photoelectric exchange board, a wireless AP (Access Point) board and the like which are arranged in a substation housing effectively in an integrated mode. According to the mining general type monitoring substation, the backup battery contained power supply function, the environmental monitoring function, the personnel identification card-reading function, the wireless communication function, the video monitoring function and the optical fiber switcher function can be integrated into a whole in one substation, the substation can be applied to a mine environmental monitoring system, a mine personnel positioning management system, a mine wireless communication system and a mine video monitoring system simultaneously, and accordingly the purpose that multiple underground networks of a mine are integrated into a whole can be achieved indeed. The mining general type monitoring substation can be in direct communication with a central station host of a personnel positioning system and the identification card information of the identification area of the mining general type monitoring substation can be read directly and displayed. The mining general type monitoring substation can be in external connection with eight card readers and in communication with the central station host of the personnel positioning system and the eight card reader collected personnel information of the respective identification areas can be read and displayed.

Description

一种矿用一般型监测分站 Ore general type monitoring station

技术领域 FIELD

[0001] 本实用新型涉及一种用于金属非金属矿山的地面及井下环境监测、人员识别、无线通信、视频监控用的自带电源的综合监控电气设备,属矿井安全监测技术领域。 [0001] The present invention relates to a method for metal and nonmetal surface and underground mine environment monitoring, personal identification, wireless communication, self-powered integrated monitoring electrical equipment used in video surveillance, is the field of mine safety monitoring technology.

背景技术 Background technique

[0002]目前公知的矿用分站,主要为功能单一的环境监测分站、人员识别读卡分站、无线通信基站等,分别应用于矿井环境监测系统、矿井人员定位管理系统、矿井无线通信系统等。 [0002] It is well known mine substation, the main function of a single environmental monitoring station, sub-station personal identification reader, wireless communication base station, etc., are used in mine for environmental monitoring system, the mine personnel location management system, a wireless communication Mine systems. 各系统在矿井中分别布线、各自为阵,安装维护这些系统需要投入大量的人力物力。 Each wiring system in the mine, respectively, each array, installation and maintenance of these systems requires a lot of manpower and resources. 也有将人员识别读卡功能与无线通信功能合为一体的矿井分站能够简化系统的结构。 The personal identification reader has a wireless communication function and function as one of the sub-station the mine system can be simplified. 近年来也有进行“三网合一”的系统,其结构主要是增加矿用光纤交换机设备,建立井下光纤环网,各类分站与本区域的矿用光纤交换机相连,各区域的矿用光纤交换机和地面主机再组成光纤环网进行数据通讯。 In recent years, there are a "triple play" of the system, its structure is to increase the mineral fiber switch device, establishing downhole fiber optic ring network, various types of sub-station is connected to the region with the mineral fiber switches, each region mineral fiber then the host switch and the ground form an optical fiber ring network for data communication.

[0003] 公知的矿用分站一般都由18V〜24V直流电源供电,而矿井下供电为交流220V/380/660V,因此公知的矿用分站必须专门配接矿用电源箱为分站及分站所连接的各类传感器或读卡器供电。 [0003] known in general by the mine substation 18V~24V DC power supply, while the lower shaft power supply AC 220V / 380 / 660V, thus a known mine substation must be specifically connected with mining and power sub-station for the box various types of sensors or a card reader connected power substation.

发明内容 SUMMARY

[0004] 本实用新型的目的是,根据公知矿用分站在结构上、功能上的缺点和不足,本实用新型公开一种矿用一般型监测分站。 [0004] The object of the present invention, with a partial standing on the structure of a well-known mineral, functional drawbacks and disadvantages, the present invention discloses a general type of mine monitoring station.

[0005] 本实用新型的技术方案是,本实用新型一种矿用一般型监测分站由电源模块、电池组、主控板、读卡板、串口服务器板、光纤交换板、无线通信AP板组成。 [0005] The technical solution of the present invention, the present invention Ore general type monitoring station from the power supply module, battery pack, the main control board, card board, serial servers, optical fiber switch board, a wireless communication board AP composition. 主控板通过连接主单片机的RS485通讯电路连接串口服务器板,串口服务器板连接光纤交换板,并通过光纤交换板与光纤环网相连,无线通信AP板连接光纤交换板;主控板通过主单片机和显示单片机连接环境监测或人员信息检测模块和声光报警器;交流电源经AD/DC转换到DC/DC变换后分别接至备用的电池组和向其它电路供电的电源模块。 Connecting the main control board is connected via microcontroller serial RS485 communication circuit board server, the server port plate connecting fiber switch board, and are connected by an optical fiber switch board and the fiber optic ring network, a wireless communication connection plate AP fiber switch board; by the host microcontroller MPU and a display connected to the microcontroller environmental monitoring personnel information or alarm sound and light detection module; the AC power by the AD / DC converter to the DC / DC converter are respectively connected to the backup battery and the power supply to other circuits of the power module.

[0006] 主控板由单片机控制电路、传感器或读卡器信号采集电路、RS485通讯电路、遥控接收和显示电路、声光报警电路、控制输出电路组成。 [0006] The control board controlled by microcomputer circuit, or a sensor signal acquisition circuit card reader, RS485 communication circuit, remote control receiver and display circuitry, sound and light alarm circuit, the output of the control circuit. 主控板使用了两个单片机,一个主单片机为多功能双串口W77E58单片机,主要用于信息采集、处理、通讯使用,另一个单片机为89S52单片机,用于显不和声光报警输出使用。 MPU uses two microcontrollers, a master MCU W77E58 multifunctional dual serial microcontroller, mainly used for information collection, processing, communication use, other 89S52 microcontroller MCU is not significant for the use of sound and light alarm output.

[0007] 本实用新型KJ752-F矿用一般型监测分站(简称分站)在结构上将电源模块、电池组、主控板、串口服务器板、光纤交换板、无线通信AP板一体化安装于一个分站壳体内;功能上实现一个分站集电源供电(含后备电池)、环境监测功能、读卡器信息采集功能、人员识别读卡功能、无线通信功能、光纤交换机功能于一体,还可外接光纤视频信号等,一个分站可同时应用于矿井环境监测系统、矿井人员定位管理系统、矿井无线通信系统、矿井视频监控系统,真正做到矿山井下“多网合一”为矿山企业减少投资,大大减轻安装维护的投入的人力和物力。 [0007] The present invention KJ752-F mine (abbreviation substation) mounting the general type of monitoring station structurally the power module, battery pack, the control board, serial servers, optical fiber switch board, a wireless communication board integrated AP in a sub-station within the housing; functionally implement a diversity sub-station power supply (with battery backup), environmental monitoring, information collection function of the card reader, personal identification card reader function, a wireless communication function, optical switching functions, but also an external fiber optic video signals, may be applied to a sub-station simultaneous mine environment monitoring system, the mine personnel positioning management system, a wireless communication system, the mine, the mine video surveillance systems, underground mine truly "multi-play" to reduce mining enterprises investment, greatly reducing installation maintenance investment of human and material resources. [0008] 本实用新型分站内部电路主要由电源模块、电池组、主控板、读卡板、串口服务器板、光纤交换板、无线通信AP板等组成。 [0008] The present invention mainly by the sub-station internal circuit power supply module, battery pack, the main control board, card board, serial servers, optical fiber switch board, composition board radio communication AP. 主要功能集中在主控板上,用于与环境监测系统或人员定位系统中心站主机的通讯,以及模拟量和开关量数据接收、处理、显示及控制或采集读卡器所识别的人员信息并显示每个读卡器所接收到的人数;读卡板可直接读取其识别区域的识别卡信息,并与人员定位系统中心站主机直接通讯并显示。 The main function of the MPU concentrated, for receiving a communication environment monitoring system the central station or host art positioning systems, and analog and digital data processing, display and control a card reader or the acquisition information of the identified person and shows the number of each received reader; plate reader identification card which can be directly read information for identifying the area, and displays and communication system Center personnel location directly with the host station. 主控板将各自采集的信息通过各自的RS485通讯电路与串口服务器板连接,串口服务器板将这两路RS485信号转换成TCP/IP信号,通过串口服务器板的RJ45 口再与光纤交换板的电口连接,将电信号转换为光信号通过光口进入光纤环网与地面各自的监控主机通讯。 MPU information collected by each of the respective servers and serial RS485 communication circuit board connector, the two channels of the serial RS485 board server signals into TCP / IP signals via the RJ45 port serial server then electrically fiber plate exchanger plates port connected to the electrical signal into an optical signal into the optical fiber ring network monitoring host communication with the respective ports through the optical surface. 无线通信AP板用于无线WIFI手机之间的通信。 AP plate for a wireless communication between wireless communication WIFI phone. 电源部分提供4路18V电源供本机工作及外部连接的八路模拟量或开关量传感器供电。 18V power supply provides four eight analog work and the machine or externally connected to the sensor power supply switch portion. 交流电停电时,电池组在控制电路的控制下自动投入使用,交流电工作时,同时给电池组充电,并具有过充过放保护功能及电池超温及过压保护功能。 When AC power failure, the battery pack is automatically put under control of the control circuit is used, alternating current work, and charge the battery pack, and having overcharge and over discharge protection and over-voltage protection and over-temperature battery.

[0009] 本实用新型的有益效果是,实现了由一种矿用一般型监测分站实现集电源供电(含后备电池)、环境监测功能、人员识别读卡功能、无线通信功能、视频监控功能、光纤交换机功能于一体,可同时应用于矿井环境监测系统、矿井人员定位管理系统、矿井无线通信系统、矿井视频监控系统,真正做到矿山井下“多网合一”,为矿山企业减少投资,大大减轻安装维护的投入的人力和物力。 [0009] The beneficial effects of the present invention is achieved by a mine achieved general type power supply monitoring station diversity (including backup battery), environmental monitoring, personal identification card reader function, a wireless communication function, video monitoring , optical switching functions in one, which can be applied to mine environmental monitoring system, mine management personnel positioning system, wireless communication system mine, mine video surveillance systems, truly underground mine "multi-play" for mining companies to reduce investment, greatly reducing installation maintenance investment of human and material resources.

[0010] 本实用新型适用于矿井环境监测、矿井人员定位、矿井无线通信、矿井视频监控管理。 [0010] The present invention is suitable for environmental monitoring mine, the mine personnel location, mine radio communication, video surveillance mine management.

附图说明 BRIEF DESCRIPTION

[0011] 图1为本实用新型矿用一般型监测分站的外观及总装结构主视图; [0011] FIG. 1 with the present invention ore the appearance and structure of the general type of assembly monitoring station front view;

[0012] 图2本实用新型矿用一般型监测分站的总装结构剖视图; [0012] FIG. 2 of the present invention with a sectional view of the assembly structure of the mine general type of monitoring station;

[0013] 图3为本实用新型的电路原理图; [0013] FIG. 3 is a circuit diagram invention;

[0014] 图中图号:1是防水电缆进线嘴;2是蓄电池;3是显示窗;4是蜂鸣器;5是铭牌;6是电涌保护器;7是可调电源;8是光纤交换机板;9无线通信AP模块;10是主控电路板;11是顶面;12是网路延伸器;13是底面;14是基板底座;15是电源模块;16是串口服务器板。 [0014] FIG. FIG. NO: 1 watertight cable entry nozzle; 2 is a battery; a display window 3; 4 buzzer; 5 nameplate; surge protector is 6; 7 is an adjustable power source; 8 fiber switch board; 9 AP wireless communication module; a main control circuit board 10; 11 is the top surface; web 12 is extender; 13 is a bottom; base 14 is a substrate; a power supply module 15; 16 a serial board server.

具体实施方式 Detailed ways

[0015] 本实用新型以KJ752-F矿用一般型监测分站为本实用新型的实施例。 [0015] In the present invention KJ752-F mine general type monitoring station embodiment of the present invention.

[0016] 图1为本实施例KJ752-F矿用一般型监测分站的外观及总装结构示意图。 Appearance and structural assembly with a schematic view of the general type of monitoring station according ore KJ752-F [0016] 1 of the present embodiment FIG.

[0017] 本实施例矿用一般型监测分站外围共有10个防水电缆进线嘴,其中一个较大的是交流电源电缆进线嘴,另外八个较小的是外接各种传感器电缆进线嘴;内部设计为一个整体的机芯由螺丝固定与分站外壳底座整个机芯可以整体装入和取出,便于调试和维护。 [0017] Example embodiments of the present general type of mine monitoring station 10 total peripheral watertight cable entry nozzle, which is a large AC power cable entry nozzle, eight additional various external sensors is smaller cable entries mouth; interior designed as an integral whole movement for loading and unloading movement can be integrally fixed by screws to the housing base sub-station, easy to debug and maintain. 整个机芯分三层:电涌保护器、稳压开关电源模块、免维护铅酸蓄电池装入电池槽内分别用螺丝固定于机芯底座;串口服务器板、光纤交换板、无线通信AP板位于中间层分别用螺柱固定于机芯;电源开关旋钮、电源线和控制线接线柱、主控板用螺柱固定于机芯最上部,读卡板由四个小螺柱固定在主控板上,八路传感器或读卡器电缆接线插座焊接在主控板上;分站外壳盖板有两个显示窗口,读卡板上IXD显示器位于左边显示窗口下,传感器或读卡器信息显示数码管位于右边显示窗口下。 Entire movement divided into three layers: surge protection, voltage regulator switching power supply module, maintenance-free lead-acid batteries are charged with the battery compartment to the movement of the base with screws; serial server board, an optical fiber switch board, a wireless communication AP plate is studs respectively fixed to the intermediate layer to the movement; knob power switch, the power supply line and the control line terminal, to the control board fixing studs uppermost movement by the plate reader four small studs fixed to the control board on the eight sensor or reader cable connection socket welded to the main control board; sub-station has two display windows of the housing cover, the card reader display panel IXD display window on the left, the sensor reader or digital information display on the right display window.

[0018] 图2为本实施例KJ752-F矿用一般型监测分站的电路原理图,外部交流电源通过电源线接入本分站的交流接线柱端子,经稳压开关电源模块的AC/DC和DC/DC转换以及电源控制电路,输出4路18V电源供本机工作及外部连接的八路传感器或读卡器供电。 Circuit diagram of the general type of monitoring station, an external terminal of AC power supply is connected to AC terminal station through sub power supply line embodiment KJ752-F mine [0018] FIG. 2 of the present embodiment, the AC power supply via the switching voltage regulator module / DC and DC / DC converter and a power control circuit which outputs a sensor or reader eight power supply for the unit of work and the external connection 4 18V. 电池组为一节0T7-12型免维护铅酸蓄电池,容量为12V/7Ah,当交流电停电时,电池组在电源控制电路的控制下自动投入使用,交流电工作时,电源控制电路同时给电池组充电,并具有过充过放保护功能及电池超温及过压保护功能。 The battery pack is a 0T7-12 maintenance-free lead-acid batteries with a capacity of 12V / 7Ah, when the AC power failure, the battery pack is automatically put into use in the power supply control circuit, alternating current work, while the power control circuit to the batteries charging, and over-charge and over-discharge of the battery over-temperature protection and overvoltage protection. 主控板主要由单片机控制电路、传感器或读卡器信号采集电路、RS485通讯电路、遥控接收和显示电路、声光报警电路、控制输出电路等组成。 The main control board by the microcontroller control circuit, a sensor signal acquisition circuit or card reader, RS485 communication circuit, remote control receiver and display circuitry, sound and light alarm circuit, the output of the control circuit. 主控板使用了两个单片机,一个主单片机为多功能双串口W77E58单片机,主要用于信息采集、处理、通讯使用,另一个单片机为89S52单片机,用于显示和声光报警输出使用。 MPU uses two microcontrollers, a master MCU W77E58 multifunctional dual serial microcontroller, mainly used for information collection, processing, communication use, other microcontroller MCU 89S52, sound and light alarm output for display use. 主控板既可为环境监测系统使用又可为人员定位系统使用。 MPU may be used either for the environmental monitoring system but also for the person using the positioning system. 当为环境监测系统使用时,可通过遥控器将该分站设置为环境监测分站模式,八路外接传感器信号通过主控板信号采集电路进入主单片机的八个输入Pl.0〜Pl.7,在单片机软件控制下将这八路信号进行实时采集、运算处理,并传送给显示单片机控制进行数据显示并超限声光报警和控制输出信号,同时将这些实时数据和状态通过RS485通讯电路上传给上位机并接收上位机的命令;当为人员定位系统使用时,可通过遥控器将该分站设置为人员定位分站模式,八路外接读卡器RS485通讯线并接在主控板的另一路RS485通讯电路上,然后进入主单片机的复用功能脚Pl.2和Pl.3,该复用功能脚既可做标准的输入输出口又可做串口I的接收(RXDl)和发送口(TXTl)(主单片机的串口0已用于和地面系统主机的串口通讯用),在单片机软件控制下依次这八路读卡器采集的人员信息进行实时 When used for environmental monitoring system, the remote control may be provided to the substation environment monitoring station mode, eight external sensor signals into the main microcontroller through the MPU eight input signal acquisition circuit Pl.0~Pl.7, performed under software control these eight single-chip real-time acquisition signal, arithmetic processing, and transmitted to the display control data and the microcontroller overrun sound and light alarm and control output signal, while the real-time data and status through the RS485 communication circuit uploaded to the host receiving machine and a host computer; and when used as a positioning system personnel, may be provided to the sub-station personnel positioning sub-station mode through the remote controller, eight external card reader connected to the RS485 communication line and the other way RS485 MPU the communication circuit, and then enter the multiplexing function pin and Pl.3 Pl.2 main microcontroller, the multiplexing function pin can do the standard input and output port in turn receives serial I do (RXDl) and the transmission port (TXTl) (serial communication host microcontroller serial port 0 and terrestrial systems have been used with the host), personnel information under the control of the microcontroller software which in turn eight readers collected in real time 讯采集,并传送给显示单片机控制显示每个读卡器区域的人员数,同时将这些实时的人员信息通过串口0及RS485通讯电路上传给上位机并接收上位机的命令。 Information collected and transmitted to the microcontroller controls the display displays the number of persons for each region reader, while those who uploaded information in real time through the serial port 0 and RS485 communication circuit receives command to the host computer and the host computer. 该分站自带的读卡板可直接读取经过该分站识别区域的识别卡卡号和信息,该读卡板电路由单片机控制电路、RFID无线收发电路、数据存储电路、LCD显示电路等组成,当工作人员携带识别卡经过该分站的识别区域时,分站通过RFID无线收发电路读取该识别卡卡号和信息,单片机将实时收到的人员数量和卡号信息进行实时显示,同时将这些信息通过RS485通讯电路上传给上位机并接收上位机的命令,当通讯故障时将这些信息存储,待通讯正常后将这一时段信息补传。 The substation carrying plate reader can be directly read through the card number and the identification information of the sub-region of the station identification, the reader circuit is controlled by microcomputer circuit board, the composition RFID wireless transceiver circuitry, data storage circuit, LCD display circuit when the staff identification card carrying identifying the region through the sub-station, sub-station reads the card number and the identification information of the RFID wireless transceiver circuitry, the number of personnel and the microcontroller card information received in real-time real-time display, while those information uploaded via the RS485 communication circuit to the host computer and the host computer receives the command, when the communication fault store the information, the communication will be the normal complement transmission period information. 主控板和读卡板将各自采集的信息通过各自的RS485通讯电路与串口服务器板连接,每个串口服务器板各分配一个唯一的网络IP地址,串口服务器板将这两路RS485信号转换成TCP/IP信号,通过串口服务器板RJ45 口与光纤交换板的电口连接,将电信号转换为光信号进入光纤环网与地面各自的监控主机通讯。 MPU and collected information on the respective plate reader connected via respective server RS485 serial communication circuit and the plate, each plate of each server port assigned a unique network IP address, the server port plate converts the two-way RS485 signals into TCP / IP signals, electrically connected to the board by port optical switching server port RJ45 port plate, converts the electrical signal into an optical signal into the optical fiber ring network monitoring host communication with the respective ground. 光纤交换板共有3个电口和2对光口;无线通信AP板用于与无线WIFI手机的通信,通过自身网口与光纤交换板连接进入光纤环网,在地面调度软件的控制下实现语音通话等功能;外部的光纤视频信号也可接入本分站的光纤输入口通过光纤环网进入地面视频监控系统。 Optical switching plate a total of three electrical interfaces and optical interface; AP wireless communications board for communicating with a wireless WIFI phone connected through its own optical fiber network port exchange plates into the fiber optic ring network, voice under the control of scheduling software ground calls and other functions; external video signal may also access optical fiber input port of the sub-station video surveillance system into the ground through the optical fiber ring network.

Claims (3)

1.一种矿用一般型监测分站,其特征在于,所述分站由电源模块、电池组、主控板、读卡板、串口服务器板、光纤交换板、无线通信AP板组成;主控板通过连接主单片机的RS485通讯电路连接串口服务器板,串口服务器板连接光纤交换板,并通过光纤交换板与光纤环网相连,无线通信AP板连接光纤交换板;主控板通过主单片机和显示单片机连接环境监测或人员信息检测模块和声光报警器;交流电源经AD/DC转换到DC/DC转换后分别接至备用的电池组和电源模块。 A mine, characterized in that the general type of monitoring station, the substation by the power supply module, battery pack, the main control board, card board, serial servers, optical fiber switch board, a wireless communication AP plates; Main by connecting the main control board microcontroller serial RS485 communication circuit connected to the server board, fiber board connecting serial server switch board, and are connected by an optical fiber switch board and the fiber optic ring network, a wireless communication connection plate AP fiber switch board; by the host microcontroller MPU and environmental monitoring microcontroller connected to display information or personal alarm sound and light detection module; AC power by the AD / DC converter to the DC / DC converter are respectively connected to a backup battery pack and a power module.
2.根据权利要求1所述的一种矿用一般型监测分站,其特征在于,所述电源模块、电池组、主控板、串口服务器板、光纤交换板、无线通信AP板一体化安装于所述分站的壳体内。 The Ore according to claim 1 with the general type of monitoring station, wherein the power module, battery pack, the control board, serial servers, optical fiber switch board, a wireless communication integrated mounting plate AP in the housing of the sub-station.
3.根据权利要求1所述的一种矿用一般型监测分站,其特征在于,所述主控板由单片机控制电路、传感器或读卡器信号采集电路、RS485通讯电路、遥控接收和显示电路、声光报警电路、控制输出电路组成;主控板使用了两个单片机,一个主单片机为用于信息采集、处理、通讯使用的多功能双串口W77E58单片机,另一个单片机为用于显示和声光报警输出的89S52单片机。 3. Mine according to one of claim 1 to claim general type monitoring station, wherein said control board controlled by microcomputer circuit, or a sensor signal acquisition circuit card reader, RS485 communication circuit, display and remote control receiver circuit, sound and light alarm circuit, the output of the control circuit; microcontroller uses two main control board, a main microcontroller for information collection, processing, versatile microcontroller W77E58 dual serial communication used for displaying the other MCU and sound and light alarm 89S52 microcontroller output.
CN 201320504812 2013-08-19 2013-08-19 Mining general type monitoring substation CN203488212U (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105094102A (en) * 2015-09-16 2015-11-25 成都比善科技开发有限公司 Intelligent district data acquisition system equipped with serial server
CN105134296A (en) * 2015-09-18 2015-12-09 煤炭科学技术研究院有限公司 Digital mine safety monitoring system
CN105137948A (en) * 2015-09-15 2015-12-09 泰山医学院 Visualized and intellectualized safety control substation system for monitoring data
CN107171281A (en) * 2017-07-04 2017-09-15 合肥东玖电气有限公司 Overvoltage protection device with high intelligent degree

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105137948A (en) * 2015-09-15 2015-12-09 泰山医学院 Visualized and intellectualized safety control substation system for monitoring data
CN105094102A (en) * 2015-09-16 2015-11-25 成都比善科技开发有限公司 Intelligent district data acquisition system equipped with serial server
CN105134296A (en) * 2015-09-18 2015-12-09 煤炭科学技术研究院有限公司 Digital mine safety monitoring system
CN105134296B (en) * 2015-09-18 2017-05-24 煤炭科学技术研究院有限公司 A digital mine safety monitoring system
CN107171281A (en) * 2017-07-04 2017-09-15 合肥东玖电气有限公司 Overvoltage protection device with high intelligent degree

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