CN2185456Y

CN2185456Y - High-precise auto-travelling inspecting event recorder for electric power system

Info

Publication number: CN2185456Y
Application number: CN 94226674
Authority: CN
Inventors: 陆厚平; 邹波; 金健
Original assignee: 陆厚平
Priority date: 1994-01-28
Filing date: 1994-01-28
Publication date: 1994-12-14
Anticipated expiration: 2004-01-28

Abstract

The utility model relates to a high precision automatically travelling inspecting event recorder for electric power systems. Every input end of latch buffers of the utility model is connected with the leading end of condition signals which are monitored by an electric power system. Data output ends of every latch buffer are connected together in parellel to be connected with the data bus of a host machine. Ends of every latch of the utility model are connected in parellel to be connected with any address strobe end of a decoder, and buffering ends of every latch buffer are respectively connected with other address strobe ends of the decoder. The address input ends of an address allocator and the decoder are connected with the high digit end and the low digit end of the address bus of a host machine respectively and correspondingly.

Description

High-precise auto-travelling inspecting event recorder for electric power system

The utility model relates to patrols and examines the logout device automatically in a kind of electric system.

Along with the accelerated development of power construction, increasing high capacity unit puts into operation, the automatic controlling level height of these units, and the contact between the unit each several part is very tight, and therefore good operating condition is most important to safety, the economical operation of unit.Normally move for the safety that guarantees unit, just require to each alarm set point of unit carry out in real time, accurately, monitoring, record reliably so that on-the-spot full-time staff analyzes, provide science, foundation accurately for the operations staff in time adjusts operating condition.The common various working signal that adopts many single-chip microcomputers to receive genset respectively of logout device of patrolling and examining automatically that the generation current unit is supporting carries out front-end processing, send main frame to carry out post-processed then, finishes the function of automatic patrol record.But this class device need adopt many single-chip microcomputers, its line construction complexity, and cost height, main frame be to the management coordination more complicated of each single-chip microcomputer, and each single-chip microcomputer and main frame have clock separately, so be difficult for the accuracy requirement that reaches higher.

The purpose of this utility model is exactly in order to address the above problem, and provides a kind of electric system simple in structure, that cost is low, precision is high the High Precision Automatic logout device of patrolling and examining.

Technical solution of the present utility model:

The High Precision Automatic logout device of patrolling and examining of a kind of electric system, it includes computer system host, it is characterized in that a plurality of each input end that latchs impact damper are connected with the working condition signal exit that electric system will be monitored respectively, the data output end that respectively latchs impact damper all and connect together and be connected with the data bus of main frame, that respectively latchs impact damper latchs end all and connect together and be connected with arbitrary address strobe output terminal of code translator in the multilevel decoding device of being made up of address distributor and code translator, the buffering end that respectively latchs impact damper respectively with the multilevel decoding device in the corresponding connection of remaining each address strobe output terminal of code translator, in the multilevel decoding device address input end of the address input end of address distributor and code translator respectively be connected corresponding of a high position of the address bus of main frame with low level.

The utility model employing is simply latched many single-chip microcomputers of buffer structure replacement and is carried out front-end processing, then by host process.Line construction is simplified greatly, and cost reduces greatly, and dilatation is convenient and surplus is big, and respectively latchs the clock work in unity of impact damper by main frame, so precision can improve greatly.Therefore, the utility model can guarantee that when the alarm set point signal is is uninterruptedly patrolled and examined automatically on-site signal do not lose, (as 1ms) carries out dynamic latch to the state of all switching values, analog signals at the appointed time, precedence and state thereof that directly reflection incident takes place, make that the record of incident is accurate more, reliable, and can forever store, play the effect of power plant's " black box ".The utility model equally can be in fields such as metallurgy, chemical industry, traffic as the desirable monitoring device of collection control occasion.

Fig. 1 is an electrical schematic diagram of the present utility model.

Be to latch impact damper U among Fig. 1 with eight ₅-U ₁₂(model can be 74LS374) is example, and they have 64 input ends, can gather 64 working condition signals of electric system, if the working condition signal that will monitor surpasses 64, only the number that needs corresponding increase to latch impact damper gets final product.Suppose to latch impact damper U ₅-U ₁₂Each input end receive the signal that transfinites such as boiler water level signal, pressure fan signal, induced draft fan signal and temperature, pressure, oil mass of outside electricity generation system, then U respectively ₅-U ₁₂Directly send these signals to main frame U by data bus ₁, (U ₁Can adopt the above computing machine of 286 class), be preferably in and respectively latch impact damper U ₅-U ₁₂Output and main frame U ₁Data inputs between insert bus transceiver U ₄(model can be 74LS245) is to play the insulation blocking effect.Respectively latch impact damper U ₅-U ₁₂Latch end C all and connect together with the multilevel decoding device in code translator U ₃The gating output terminal S of (model can be 74LS154) ₈Connect U ₅-U ₁₂Each buffering end E respectively with U ₃Gating output terminal S ₀-S ₇Connect main frame U ₁By address distributor U in the multilevel decoding device ₂(model can be 74LS688) and code translator U ₃Latch impact damper U to eight ₅-U ₁₂The external signal of being gathered reads successively, main frame U ₁Read cycle be 1ms.U ₁To latch impact damper U according in house software ₅-U ₁₂The external signal of being gathered compares with the external signal of last time being gathered, and has seen no change, if no change, main frame U ₁Do not handle, continuing with 1ms is constantly to judge new external signal of gathering at interval.If change main frame U ₁Just with corresponding external signal variable quantity and at that time time keeping get off, and show, print, storage, send warning simultaneously, remind the operation personnel.

If when electric system wants monitored signal to be analog quantity, then insert a plurality of analog to digital converters (model can be AD574) again, correspondingly the input end of each analog to digital converter is connected with the simulating signal exit that will monitor, its output terminal and main frame U ₁Data bus connect, its analog to digital conversion end also connects together and code translator U ₃All the other gating output terminals connect.The course of work is similar fully to the patrol record process of above-mentioned digital quantity external signal.

Claims

1, the High Precision Automatic logout device of patrolling and examining of a kind of electric system, it includes computer system host, it is characterized in that a plurality of each input end that latchs impact damper are connected with the working condition signal exit that electric system will be monitored respectively, the data output end that respectively latchs impact damper all and connect together and be connected with the data bus of main frame, that respectively latchs impact damper latchs end all and connect together and be connected with arbitrary address strobe output terminal of code translator in the multilevel decoding device of being made up of address distributor and code translator, the buffering end that respectively latchs impact damper respectively with the multilevel decoding device in the corresponding connection of remaining each address strobe output terminal of code translator, in the multilevel decoding device address input end of the address input end of address distributor and code translator respectively be connected corresponding of a high position of the address bus of main frame with low level.

2, by the High Precision Automatic logout device of patrolling and examining of the described electric system of claim 1, the data output end that it is characterized in that respectively latching impact damper all and connect together and be connected with host data bus by bus transceiver.

3, by the High Precision Automatic logout device of patrolling and examining of the described electric system of claim 1, it is characterized in that if when wanting monitored signal to be analog quantity, then insert a plurality of analog to digital converters again, correspondingly the input end of each analog to digital converter is connected with the simulating signal exit that will monitor, its output terminal is connected with the data bus of main frame, its analog to digital conversion end and connecing together links to each other with arbitrary gating output terminal of code translator, and it respectively reads end and is connected with all the other gating output terminals of code translator respectively.