KR20050045112A - Both for communication multiplexer - Google Patents

Abstract

In the unmanned security and access control system, a multiple communication multiplexer is used to connect the upper level control equipment through a single communication port and to connect a plurality of subordinate devices to relay the receiving and bidirectional transmission of data transmitted at a predetermined communication speed. About

It is installed at a certain position in front of the panel, and it is a key input unit for inputting various function settings and data necessary for the operation of the system, and the overall operation and various functions for the multiplexing and demultiplexing processing in transmitting and receiving data between the upper control device and the lower device. Consists of a control unit for controlling the operation of the setting, printer control and display, an LCD display window, a first display unit for displaying the operation status information according to the set function, and an LED display window, the power status and communication status by channel The second display unit to be displayed is connected to the control device, which is the upper device, through a single communication port, and the multiplexed data for transmission to the lower device is demultiplexed for transmission to the lower device according to the control signal applied from the control unit. Host signal processing to multiplex the data of each uploaded channel and transmit it to the host device And a plurality of communication ports, and in response to a control signal applied from a control unit, the host signal processing unit transmits download data applied by demultiplexing to the lower device connected to each port, and uploads data from each lower device. A channel signal processing unit for transmitting the data to the host signal processing unit, a printer processing unit for outputting data transmitted to and received from the upper and lower devices, and a first power unit converting the commercial AC power into DC power and supplying the respective load elements. And a second power supply unit supplying backup power to each load element so that stable data transmission and reception can be maintained when supply of commercial power is interrupted due to power failure or power failure.

Therefore, the expensive equipment required for the construction of the system is simplified, convenience and stability are provided by connecting the upper equipment with a single port to connect a plurality of lower equipments, and data transmission and reception between the upper equipment and the lower equipment is performed. In relaying, bidirectional shared memory is applied to read / write the data to be transmitted in block units, thereby eliminating the limitation of the communication speed and eliminating the overflow of data, thereby providing safety and reliability in relaying the transmitted / received data.

Description

Multiplexer for Bidirectional Communication {BOTH FOR COMMUNICATION MULTIPLEXER}

The present invention relates to a communication multiplexer (multiplexer), more specifically in the unmanned security and access control system through a single communication port to connect the upper control equipment, a plurality of lower equipment to connect a predetermined communication speed The present invention relates to a multiplexer for bidirectional communication for relaying a reception process and a bidirectional transmission of data transmitted to a PC.

In general, the unmanned security guard and access control system is a system that reads the user information contained in the card in a contact or contactless card reader manner and permits the initiation and release of the guard for the registered personnel and access.

Such an unmanned security guard and access control system is equipped with a variety of sensors for detecting unauthorized intrusion of outsiders at a predetermined position in the surveillance area, the signal of each sensor is comprehensively detected by the subscriber device or sensing device installed in the surveillance area, The signal detected by the device or the sensing device is transmitted to a control device installed remotely through a leased line or aerial.

Therefore, the operator of the control device monitors the occurrence of the unauthorized intruder from the signal detected by the subscriber device or the sensing device in each monitoring area and protects life and property in the monitoring area through a quick response accordingly.

The unmanned guard and access control system having the function as described above collects the signals of various sensors installed in each monitoring area and collects the information collected by the communication speed and protocol set in the upper equipment as shown in FIG. 1. A plurality of subscriber apparatuses / detectors 100A-100N uploading and arming, disarming, and restoring a surveillance area according to the download data from a higher level device; and the plurality of subscriber apparatuses / detectors 100A-100N. To the decoder 200 to relay data transmission and reception with the upper device by using a dedicated line or an aerial line, the multiplexer 300 and the lower device connected to the decoder 200 to relay data transmitted and received between the upper device and the lower device. Detects abnormality in each surveillance area by monitoring data received from the system and takes appropriate action. It is composed of a device (400).

In the above configuration, the multiplexer for relaying data transmission / reception between the subscriber device / sensing device (100A-100N) and the highest level equipment installed in each monitoring area that is the lowest level equipment uses a one-way communication multiplexer.

Therefore, at least one download multiplexer must be provided for the transmission of data downloaded to the lower device from the control device, which is the uppermost device, and for at least one upload for transmission of data uploaded to the related device, which is the upper device, from the lower device. Multiplexers should be provided.

That is, since each multiplexer must be provided according to each data communication direction, there is a problem that a large amount of expenses are generated in the construction of an unmanned surveillance and access management system, and as the size and height of a building increase, As the management area expands, subscriber devices / detectors respectively installed in one surveillance area also increase, and thus, multiplexers are required due to the limitations of the channels that each multiplexer can accommodate, thereby increasing the complexity of wiring. This causes a problem that requires expansion of a control device having a limited input / output port.

The present invention has been invented to solve the above problems, the object is to connect a plurality of lower equipment and to connect the control device of the upper equipment through a single port, from each of the lower equipment through the RS-232C communication line Receive and multiplex the communication data received at the set communication speed and protocol to upload to the upper control device through a single port, and de-multiplex the communication data received through the single communication port from the control device, the upper device, to each communication port. It is to be downloaded to each of a plurality of subordinate devices connected to the device.

In addition, all bidirectional communication data to and from the upper and lower devices can be printed through the printer port, and the disconnection check function for checking the status of the communication line is included.

In addition, each input / output port is set to include a function of the multi-purpose communication relay device that can be used to set the Sync (Async) / Modem (Modem) / Output (Output) mode.

The present invention for realizing the above object is a key input unit which is installed at a predetermined position in front of the panel to input various function settings and data required for the operation of the system; A control unit for controlling overall operations for multiplexing and demultiplexing processing, setting various functions, printer control, and display in data transmission and reception between the upper device and the control device; A first display unit comprising an LCD display window and displaying operation status information according to a set function; A second display unit configured of an LED display window and displaying a power state and a communication state for each channel; It connects the control device which is the upper device through the single communication port, demultiplexes the download data received from the control device for transmission to the lower device according to the control signal applied from the controller, and the data for each channel uploaded to the lower device A host signal processor for multiplexing and transmitting the multiplexed data to higher-order equipment; Comprising a plurality of communication ports, according to the control signal applied from the control unit, the host signal processor is de-multiplexed and applied to the subordinate devices connected to each port and the download data is applied, and the data uploaded from each subordinate device host A channel signal processor for transmitting to the signal processor; A printer processing unit which performs output processing of data transmitted and received to the upper equipment and the lower equipment; A first power supply unit converting commercial AC power into DC power and supplying the respective load elements; And a second power supply unit for supplying backup power to each load element so that stable data transmission and reception can be maintained when the supply of commercial power is interrupted due to a power failure or an interruption.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIG. 2, the multiplexer for bidirectional communication according to the present invention includes a key input unit 10, a control unit 20, a first display unit 30, a second display unit 40, a host signal processing unit 50, and a channel signal. The processor 60 includes a processor 60, a printer processor 70, a first power supply 80, and a second power supply 90.

The key input unit 10 is installed at a predetermined position on the front panel, including keys for inputting various function settings and data required for operating the system, and outputs key signals for system function setting and data input selected by the operator. do.

The control unit 20 controls the overall operation of the multiplexing and demultiplexing process, various function settings, printer control, and display in the data transmission and reception between the upper level control device and the lower device.

The first display unit 30 includes an LCD display window, and displays operation state information according to a set function.

The second display unit 40 is configured as an LED display window, and displays the power state or the communication state for each channel.

The host signal processing unit 50 connects a control device that is an upper device through a single communication port, and receives at a speed set by the control device, for example, 1200/2400/4800 / 9600bps according to a control signal applied from the control unit 20. It demultiplexes the downloaded data to be transmitted to the lower device, and is responsible for multiplexing the data for each channel uploaded to the lower device to the upper device.

The channel signal processing unit 60 includes a plurality of communication ports, preferably 8 channel communication ports, and download data applied by demultiplexing by the host signal processing unit 50 according to a control signal applied by the control unit 20. It transmits at a predetermined speed set in the lower equipment connected to each communication channel, and applies the data uploaded at the communication speed set in each lower equipment to the host signal processor 50.

The printer processing unit 70 performs output processing of the corresponding data transmitted and received through the connected printer when the output request of the data transmitted / received to the upper device and the lower device is detected.

The first power supply unit 80 converts a general commercial power supply of 110V ~ 220V / 60Hz into DC power required for each load element of the system and supplies it to each load element.

The second power supply unit 90 supplies a backup power to each load element so that stable transmission and reception of data can be maintained when the supply of commercial power is interrupted by a battery, such as a power failure or a power failure.

The operation of the multiplexer for bidirectional communication according to the present invention including the functions as described above is performed as follows.

When operating power is supplied to each load element in the first power supply unit 80 or the second power supply unit 90, the operator sets a function for each communication port on the system setting screen to enable the corresponding port (channel). Let's do it.

As described above, when the function setting is completed, the controller 20 searches for the state of each port that maintains an active state at a set cycle through a polling method and uploads or uploads data to a control device that is an upper device. It is checked whether there is data to be downloaded from the control device which is the equipment to the decoder which is the subordinate equipment.

At this time, when data to be uploaded or downloaded is searched on any activated communication port, the data is taken and temporarily stored in the DPM (Dual Port Memory) provided in the controller 20.

Subsequently, the data stored in the DPM is taken in units of blocks according to the set polling period and transmitted to the controller device, which is an upper device connected to a single port of the host signal processor 50, or a lower device connected to the channel signal processor 60. Send to the encoder.

As described above, RS-232C serial communication is performed for an interface between a dedicated line decoder / airline decoder, which is a lower device connected to each of a plurality of channels, and a control device, which is an upper device connected to a single port, and the communication speed is 9600bps. Depending on the functional features of the equipment and subordinate equipment, it is possible to set up to 1200/2400 / 4800bps by manual operation by the operator.

The data to be communicated preferably comprises a start bit of 1 bit, a data bit of 8 bits, and an end bit of 1 bit.

The configuration of the communication data is not limited to this, and various changes can be made depending on the amount of data.

The communication mode preferably allows serial communication to be performed for the Sync / Async / Modem / Output mode. The communication format is “LF + DATA + CR”, “DATA + CRLF”. ", And manual selection is possible depending on the functional characteristics of the system and the occurrence of events.

In addition, the data format for uploading the data received from the decoder, which is a lower device, to the controller, which is a higher device, has a structure of "UUUU 18 E (R) CCC EE ZZZ".

In the above, "UUUU" is a user ID, the usage range is 0001 to 9999, "18" is CONTACT_ID FORM IDENTIFIER, "E (R)" is EVENT / RESTORE, "CCC" is EVENT CODE, and "EE" is Generally, it is always set to the value of "00", and in case of using an expander, it is represented by 00 ~ 99 as the expander ID, "ZZZ" is the card number when disarming, and the number for the surveillance area when invading / recovering. it means.

In addition, the data format for downloading the data received from the control device, the upper device to the lower device has a structure "LINE DD CC UUUU ARMED / DIARM EE".

In the above, "LINE" means the division of the communication line, "DD" is the decoder number of the subordinate equipment, "CC" is the decoder channel number, "UUUU" is the user number, "ARMED / DIARM" is the remote boundary Command / remote release command, "EE" is the lowest equipment expander number, "00" means asserted value, and 01 ~ 99 means expander.

 As described above, the present invention implements the multiplexer configured in the unmanned security and access control system to perform the bidirectional communication function, thereby simplifying the expensive equipment required for the construction of the system, and connecting a plurality of higher-level equipment to a single port. Provides convenience and stability for operation by allowing downstream equipment to be connected.

In addition, in relaying data transmission and reception between the upper and lower devices, the bidirectional shared memory is applied to read / write the data to be transmitted in block units, thereby eliminating the limitation of the communication speed, and eliminating the overflow of data to relay the data. Safety and reliability are provided.

1 is a device layout of a typical unmanned guard and access control system.

Figure 2 is a detailed configuration of the multiplexer for bidirectional communication applied to the unmanned security and access control system according to the present invention.

Claims (3)

A key input unit installed at a predetermined position in front of the panel to input various function settings and data necessary for operating the system; A control unit for controlling overall operations for multiplexing and demultiplexing processing, setting various functions, printer control, and display in data transmission and reception between the upper device and the control device; A first display unit comprising an LCD display window and displaying operation status information according to a set function; A second display unit configured of an LED display window and displaying a power state and a communication state for each channel; It connects the control device which is the upper device through the single communication port, demultiplexes the download data received from the control device for transmission to the lower device according to the control signal applied from the controller, and the data for each channel uploaded to the lower device A host signal processor for multiplexing and transmitting the multiplexed data to higher-order equipment; Comprising a plurality of communication ports, according to the control signal applied from the control unit, the host signal processor is de-multiplexed and applied to the subordinate devices connected to each port and the download data is applied, and the data uploaded from each subordinate device host A channel signal processor for transmitting to the signal processor; A printer processing unit which performs output processing of data transmitted and received to the upper equipment and the lower equipment; A first power supply unit converting commercial AC power into DC power and supplying the respective load elements; And a second power supply unit for supplying backup power to each load element so that stable data transmission and reception can be maintained when the supply of commercial power is interrupted due to a power failure or a power failure. The method of claim 1, The control unit includes a bidirectional shared memory, bidirectional communication multiplexer, characterized in that for reading and writing data transmitted and received between the upper and lower equipment in units of blocks. The method of claim 1, The control unit monitors each communication port to which the upper device and the lower device are connected at a set period in a polling manner, and detects and stores data transmitted and received.