CN200979736Y - A bus preemptive warning linkage controller - Google Patents
A bus preemptive warning linkage controller Download PDFInfo
- Publication number
- CN200979736Y CN200979736Y CNU2006200279063U CN200620027906U CN200979736Y CN 200979736 Y CN200979736 Y CN 200979736Y CN U2006200279063 U CNU2006200279063 U CN U2006200279063U CN 200620027906 U CN200620027906 U CN 200620027906U CN 200979736 Y CN200979736 Y CN 200979736Y
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- interface
- bus
- chip microprocessor
- microprocessor mcu
- bus transceiver
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Abstract
The utility model relates to a bus preemptive alarm linkage controller characterized in that a single chip M C U is connected with a receiving / sending enabling interface of a R S 4 8 5 bus transceiver (1) through I / O interface of the single chip M C U, the single chip M C U is connected with a T X D 2 interface of another R S 4 8 5 bus transceiver (2) through the U A R T- T X D interface of the single chip M C U, an electronic power switch S W 2 is arranged on the controller line between the U A R T-T X D interface of the single chip M C U and the T X D 2 interface of the R S 4 8 5 bus transceiver (2), the single chip M C U is also connected with a break request signal wire connected with the multiple alarm interface through the I N T X interface of the single chip M C U. The bus preemptive alarm linkage controller can unite the video monitoring system and the other safety and protection system, constitutes the intact, highly integrated safety and protection system.
Description
Technical field
The utility model relates to safety precaution monitoring field, belongs to the linkage control device to video monitoring front end equipment, especially a kind of bus preemptive type alarm linkage controller.
Background technology
In the security system of a practicality, video monitoring front end equipment is except receiving and carry out the PTZ steering order from video monitoring rear end equipment (as video switcher, DVR and supervisory keyboard etc.) effectively, the alarm linkage that also requires them can in time respond from special controlling alarm main frame instructs, usually the priority of these alarm linkages instructions is higher than general PTZ steering order, the generation of this alarm linkage steering order generally by other front-end equipment (as equipment such as perimeter protection, intrusion detections) in the security system triggering.By bus preemptive type alarm linkage controller, other is system combined with video monitoring system and safety precaution, has constituted safety-protection system complete, that integrated level is very high.This associating should be with sacrificial system reliability not, unlikelyly increase substantially construction costs and increase engineering construction and operating cost is cost.
Also do not realize at present the control device of above-mentioned purpose.
Summary of the invention
The purpose of this utility model is to provide a kind of simple in structure, bus preemptive type alarm linkage controller that cost is low.
The utility model is achieved through the following technical solutions:
A kind of bus preemptive type alarm linkage controller, it is characterized in that: single-chip microprocessor MCU connects the receipts of a RS485 bus transceiver (1)/send out by its I/O interface and enables interface, single-chip microprocessor MCU connects the TXD2 interface of another RS485 bus transceiver (2) by its UART-TXD interface, one electronic switch SW2 is installed on the control line between the TXD2 interface of the UART-TXD interface of single-chip microprocessor MCU and RS485 bus transceiver (2), single-chip microprocessor MCU connects front-end equipment ID and bus communication protocol selector switch by its I/O S interface, connect the multiple alarm interface by its I/O S interface, this single-chip microprocessor MCU also connects an interrupt request singal line that is connected with the multiple alarm interface by its INTX interface.
And the control line between the TXD2 interface of the UART-TXD interface of single-chip microprocessor MCU and RS485 bus transceiver (2) also is connected the RXD1 interface of RS485 bus transceiver (1), and an electronic switch SW1 is installed on this control line.
Described single-chip microprocessor MCU adopts the chip with sleep mode, and described electronic switch adopts integrated analog switch or tri-state gate circuit.
Advantage of the present utility model and good effect are:
The entire circuit of this controller is simple in structure, and is practical, ideally realized bus preemptive type alarm linkage function.By this bus preemptive type alarm linkage controller, can other be system combined with video monitoring system and safety precaution, constituted safety-protection system complete, that integrated level is very high.
Description of drawings
Fig. 1 is a circuit block diagram of the present utility model;
Fig. 2 is the application synoptic diagram of Fig. 1 in supervisory system.
Embodiment
Below in conjunction with accompanying drawing embodiment of the present utility model is further described, but is not limited to the concrete structure that present embodiment is narrated.
This bus preemptive type alarm linkage controller is by single-chip microprocessor MCU, the RS485 bus transceiver, electronic switch constitutes, the physical circuit of this controller is: single-chip microprocessor MCU connects the receipts of a RS485 bus transceiver (1)/send out by its I/O interface and enables interface, single-chip microprocessor MCU connects the TXD2 interface of another RS485 bus transceiver (2) by its UART-TXD interface, one electronic switch SW2 is installed on the control line between the TXD2 interface of the UART-TXD interface of single-chip microprocessor MCU and RS485 bus transceiver (2), this control line be connected with the RXD1 interface of RS485 bus transceiver (1) and control line betwixt on an electronic switch SW1 is installed, single-chip microprocessor MCU connects front-end equipment ID and bus communication protocol selector switch by its I/OS interface, connect the multiple alarm interface by its I/OS interface, this single-chip microprocessor MCU also connects an interrupt request singal line that is connected with the multiple alarm interface by its INTX interface.
Single-chip microprocessor MCU adopts the chip with sleep mode in the present embodiment, and described electronic switch adopts integrated analog switch or tri-state gate circuit.
Each functions of components of the present utility model is:
Single-chip microprocessor MCU: most of popular MCU can be competent at, and recommend to use the MCU with sleep mode.
The I/O interface of " front-end equipment ID and bus protocol selector switch " and MCU: it provides information such as the employed communications protocol of ID address, bus of the video monitoring front end equipment of being controlled and baud rate for controller, in other words, alarm linkage controller unit correspondence an equipment among the video monitoring front end equipment group.
" multiple alarm interface ": be used for receiving the multiple alarm contact signal from the alarm controller main frame, contact signal can be switching value signals such as passive contact, active contact, and the quantity of input contact is determined by actual needs." multiple alarm interface " can also support an interrupt request singal line (AlarmInterrupt) usually, and when the alert if of the individual input arbitrarily in the remote alarm interface was set up, interrupt request was effective.
" RS485 bus transceiver (1) ": this bus interface is as the bus input of this controller, and it is relatively near rear end equipment on being electrically connected.
" RS485 bus transceiver (2) ": this bus interface is as the bus output of this controller, and it is relatively near front-end equipment on being electrically connected.Generally, this transceiver is the normal enabled state that sends.
Principle of work of the present utility model is:
SW1 among Fig. 1 and SW2 are an electronic switch, and its steering logic is synchronous with the transmitting-receiving Enable Pin of " RS485 bus transceiver (1) ", and under the situation, SW1 can omit (the normal short-circuit condition of switch ends) usually.
If " multiple alarm interface " sets up (alarm free) without any trigger condition, then state of a control is just as Fig. 1.At this moment, MCU can be dormant state, and SW1 is ON and SW2 is OFF." RS485 bus transceiver (1) " receives and enables.As seen, the serial communication controlling signal of bus input is directly delivered to the TXD2 end of " RS485 bus transceiver (2) " by " RS485 bus transceiver (1) " RXD1 output, and serial control signal is intactly delivered to output end of main.
Trigger condition establishment arbitrarily in " in case multiple alarm interface ", then interrupt request singal line (AlarmInterrupt) wakes MCU up, enters the alarm linkage control program immediately.At first MCU with " RS485 bus transceiver (1) " be changed to receive forbid, SW1 is changed to OFF and SW2 is changed to ON, blocked from the serial signal of bus input and opened passage (seizing bus) simultaneously from the UART-TXD of MCU to TXD2 to the passage of " RS485 bus transceiver (2) " TXD2; Information such as the alert if numbering of MCU basis " multiple alarm interface " and the ID of Be Controlled front-end equipment, bus protocol are sent certain alarm linkage control signal and are outputed to bus through " RS485 bus transceiver (2) ".After event handling finished, alarm controller returned to the state of a control of Fig. 1.
In real system, may need a plurality of controller devices could form complete system, can realize that according to Fig. 2 actual system connects.Among Fig. 2, dotted line the right is for monitoring in the main control room of rear end, about the connection of bus preemptive type alarm linkage linkage controller by anti-.The dotted line left side is the video monitoring front end equipment group, and they can be made up of high speed ball-shaped cloud platform video camera, The Cloud Terrace, integrated camera etc., are the passing node equipments of Serial Control bus.Bus preemptive type alarm linkage linkage controller can and insert in the bus by figure three mode cascades.
Each bus preemptive type alarm linkage linkage controller has unique ID, and corresponding with a device id among the video monitoring front end equipment group.This connected mode has determined the priority of controller: near from front-end equipment, and the priority height, on the contrary then low.
The warning initial conditions of a plurality of bus preemptive type alarm linkage linkage controllers can be shared, to constitute steering logic more flexibly.
Claims (3)
1. bus preemptive type alarm linkage controller, it is characterized in that: single-chip microprocessor MCU connects the receipts of a RS485 bus transceiver (1)/send out by its I/O interface and enables interface, single-chip microprocessor MCU connects the TXD2 interface of another RS485 bus transceiver (2) by its UART-TXD interface, one electronic switch SW2 is installed on the control line between the TXD2 interface of the UART-TXD interface of single-chip microprocessor MCU and RS485 bus transceiver (2), single-chip microprocessor MCU connects front-end equipment ID and bus communication protocol selector switch by its I/O S interface, connect the multiple alarm interface by its I/O S interface, this single-chip microprocessor MCU also connects an interrupt request singal line that is connected with the multiple alarm interface by its INTX interface.
2. bus preemptive type alarm linkage controller according to claim 1, it is characterized in that: the control line between the TXD2 interface of the UART-TXD interface of single-chip microprocessor MCU and RS485 bus transceiver (2) also is connected the RXD1 interface of RS485 bus transceiver (1), and an electronic switch SW1 is installed on this control line.
3. bus preemptive type alarm linkage controller according to claim 1 is characterized in that: described single-chip microprocessor MCU adopts the chip with sleep mode, and described electronic switch adopts integrated analog switch or tri-state gate circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006200279063U CN200979736Y (en) | 2006-10-27 | 2006-10-27 | A bus preemptive warning linkage controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006200279063U CN200979736Y (en) | 2006-10-27 | 2006-10-27 | A bus preemptive warning linkage controller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200979736Y true CN200979736Y (en) | 2007-11-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2006200279063U Expired - Fee Related CN200979736Y (en) | 2006-10-27 | 2006-10-27 | A bus preemptive warning linkage controller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200979736Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101226674B (en) * | 2007-12-11 | 2010-07-21 | 广州市聚晖电子科技有限公司 | Monitoring method capable of expanding safety prevention arrangement |
| CN103268300A (en) * | 2013-05-17 | 2013-08-28 | 浙江正泰中自控制工程有限公司 | Serial interface circuit of serial communication management server |
-
2006
- 2006-10-27 CN CNU2006200279063U patent/CN200979736Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101226674B (en) * | 2007-12-11 | 2010-07-21 | 广州市聚晖电子科技有限公司 | Monitoring method capable of expanding safety prevention arrangement |
| CN103268300A (en) * | 2013-05-17 | 2013-08-28 | 浙江正泰中自控制工程有限公司 | Serial interface circuit of serial communication management server |
| CN103268300B (en) * | 2013-05-17 | 2016-04-20 | 浙江正泰中自控制工程有限公司 | A kind of serial interface circuit of serial communication management server |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: TIANJIN YA AN TECH. CO., LTD. Free format text: FORMER NAME: YAAN SCIENCE + TECHNOLOGY ELECTRONIC CO., LTD., TIANJIN |
|
| CP03 | Change of name, title or address |
Address after: 300384 Tianjin City Huayuan Industrial Zone Ziyuan Road No. 8 Patentee after: Tianjin Yaan Technology Co., Ltd. Address before: Ziyuan road 300384 Tianjin Huayuan Industrial Park No. 8 Patentee before: Yaan Science & Technology Electronic Co., Ltd., Tianjin |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20071121 Termination date: 20131027 |