CN2261117Y

CN2261117Y - Data transmission channel monitoring switch-over device

Info

Publication number: CN2261117Y
Application number: CN 96231258
Authority: CN
Inventors: 范奎芳
Original assignee: YANCHENG POWER SUPPLY BUREAU
Current assignee: YANCHENG POWER SUPPLY BUREAU
Priority date: 1996-02-06
Filing date: 1996-02-06
Publication date: 1997-08-27
Anticipated expiration: 2006-02-06

Abstract

The utility model provides a data transmission channel automatic monitoring switching device of an electric network dispatching automatic system, mainly composed of an STD industrial bus line, a main control CPU board, an intelligent demodulator board, a level detection clock board, a speech alarm board, a multicircuit relay switch board, and two independent power supplies. The working principle is that the main control CPU board controls a switch contact of a multicircuit relay, and carries out the tour gauging, sampling analysis and calculation for multicircuit two-channel data information to judge the channel operation situation to carry out a processing scheme; the channel switching is conducted by a relay circuit. The utility model has the advantages of reasonable structure, high anti-interference capability, reliable operation, etc.; the system operation rate and the data accuracy rate are improved.

Description

Number passes the channel monitoring switching device shifter

The utility model relates to a kind of number and passes channel switching device, and the automatic monitoring that is mainly used in the active and standby number biography passage in the automation system for the power network dispatching is switched.

Active and standby number in the automation system for the power network dispatching passes the channel monitoring switching at present, by artificial attended operation, usually is subjected to the influence of factors such as Changes in weather, line outage, external force, causes loss of data, faults such as control malfunction or tripping.

The purpose of this utility model is to provide a kind of and monitors switching device shifter automatically by micro-processor controlled multichannel binary channels, overcomes the existing various shortcomings of manual operation, improves the operation ratio of automation system for the power network dispatching and the accuracy rate of data.

The utility model mainly is made up of industrial cabinet, bus slot and dress master cpu plate, MODEM intelligence demodulator plate, level detection clock board, audio alert plate, multicircuit relay switchboard and duplicate supply thereon.The master cpu plate is linked to each other with level detection clock board, MODEM intelligence demodulator plate, audio alert plate and multicircuit relay plate respectively by address bus, data/address bus and control bus through bus slot, and two separate power supplys are respectively relay switch plate and other each surface-mounted integrated circuit power supply; Three groups of contacts that pass the corresponding identical relay board of passage with the multichannel number are connected to respectively on the corresponding contact of this active and standby passage, and these three groups of contacts are respectively primary channel transfer contact, the main channel is detected the contact and is equipped with passage and detects the contact; Above-mentioned each relay board is made up of general address option interface circuit, photoelectric isolating circuit and relay drive circuit.Gather into level detection clock board that circuit and hardware clock circuit form and the input of MODEM intelligence demodulator plate is connected on the detection contact of each road primary channel by general address option interface circuit, A/D switching levels testing circuit, photoelectric switch amount.The utility model operation principle is: master cpu plate control multicircuit relay make and break contact patrols multichannel binary channels automation data information surveys sampling, the data of gathering are analyzed, calculate, judged by preset program, whether this passage work is normal, thereby the scheme of handling it, by the conversion of relay switch execution passage, or phonetic alarm is reported to the police.Testing result can be shown by LED, also can make clerking by printing interface.Its trace routine is: for certain paths; whether the level that at first detects the main channel is normal; the signal level of this passage and data modulated signal detect the contact through corresponding relay and send into MODEM intelligence demodulator plate and level detection clock board; measured signal level numerical value; reach rated value as this value; then its numeric data code is demodulated and send the master cpu plate by MODEM intelligence demodulator; to its data sync sign indicating number that demodulates; protected code calculates; detect; when detecting these numeric data codes at the appointed time; just confirm that this main channel, road is working properly, then change the alternate channel of surveying this road this moment automatically.When detection signal level, do not reach rating number as it, illustrate that then there is fault the main channel, then change automatically this moment and survey alternate channel.If signal level is normal, and detect at the appointed time, also confirm the main channel fault this moment, change automatically and survey alternate channel less than synchronous code, protected code.After active and standby passage all detects end, select the work of one of active and standby passage automatically.Simultaneously the channel failure situation is write down or reports to the police, its processing mode as shown in Table 1:

Table one:

The utlity model has structure, reasonable in design, antijamming capability is strong, reliable, close advantage such as man-computer relation.The operation ratio and the data accuracy rate of automation system for the power network dispatching have been improved.

Description of drawings:

Fig. 1 is the utility model structural representation;

Fig. 2 is the utility model electricity theory diagram;

Fig. 3 is the utility model relay switch plate electricity theory diagram;

Fig. 4 is the utility model level detection clock board electricity theory diagram.

Below in conjunction with accompanying drawing the utility model is further described: LED display is housed on the panel and detects in the STD industry cabinet 1 of keyboard bus slot 4 and electricity former 2 are housed, 3, be inserted with CPU board 5 on the bus slot 4, level detection clock board 6, MODEM intelligence demodulator plate 7, phonetic alarm plate 8 and multicircuit relay switchboard 9, independent current source 3 aims at the power supply of relay switch plate, power supply 2 is other each surface-mounted integrated circuit power supply, host CPU plate 5 is through bus slot 4, by address bus AB, data/address bus DB, control bus CB respectively with level detection clock board 6, MODEM intelligence demodulator plate 7, phonetic alarm plate 8 and multicircuit relay switchboard 9 link.One group of primary channel transfer contact Jn-1-1, the Jn-1-2 that passes the corresponding N piece of the N paths relay switch plate of one of binary channels with the multichannel number is connected to the output of this paths, one group of contact Jn-2-1, Jn-2-2 are that the contact is detected in the main channel, and contact Jn-3-1, Jn-3-2 detect the contact for being equipped with passage.Each relay switching circuit is by general address option interface circuit, by latch 74HC373, the photoelectric isolating circuit 11 that driver 74 HC05 and photoisolator 12 are formed and be made up of the relay drive circuit 13 that driver MC1413 and relay constitute.The level detection clock board is by general address option interface circuit 14, and A/D switching levels testing circuit 15, photoelectric switch Acquisition Circuit 16 and hardware clock circuit 17 are formed.Jn-2-1, Jn-3-1 and Jn-2-2, Jn-3-2 that the input of this level detection clock board and MODEM intelligence demodulator plate is connected to each paths detect on the contact for two groups.

Claims

1, a kind of number passes the channel monitoring switching device shifter, mainly form by industrial cabinet and the bus slot that has surface-mounted integrated circuit and the power supply that are loaded in it, it is characterized in that: master cpu plate, MODEM intelligence demodulator plate, level detection clock board, phonetic alarm newspaper and multichannel relay switch plate insert on the above-mentioned bus slot.The master cpu plate is linked to each other with level detection clock board, MODEM intelligence demodulator plate, audio alert plate and multicircuit relay plate respectively by address bus, data/address bus and control bus through bus slot, and two separate power supplys are respectively relay switch plate and other each surface-mounted integrated circuit power supply; Three groups of contacts that pass the corresponding identical relay board of passage with the multichannel number are connected to respectively on the corresponding contact of this active and standby passage, and these three groups of contacts are respectively primary channel transfer contact, the main channel is detected the contact and is equipped with passage and detects the contact; Above-mentioned each relay board is made up of general address option interface circuit, photoelectric isolating circuit and relay drive circuit.Gather into level detection clock board that circuit and hardware clock circuit form and the input of MODEM intelligence demodulator plate is connected on the detection contact of each road primary channel by general address option interface circuit, A/D switching levels testing circuit, photoelectric switch amount.