CN2194516Y

CN2194516Y - DC power source system on-line monitoring and measuring apparatus

Info

Publication number: CN2194516Y
Application number: CN 94229112
Authority: CN
Inventors: 吕勇军
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-07-12
Filing date: 1994-07-12
Publication date: 1995-04-12
Anticipated expiration: 2004-07-12

Abstract

The utility model relates to a DC power source system on-line monitoring device. The utility model is mainly comprises a collector 1, an emitter follower 2, an A/D transposer 3, a photocoupler 4, a single-chip microcomputer 5, a display 7, an alarm 8, an interface circuit for the collector 9, and a miniature printer 6. The collector is controlled by the single-chip microcomputer and the interface circuit for the collector, and the terminal voltage of each battery in batteries can be patrolled and sampled; the measured signal can be stored in the memory. When one battery failures, the utility model emits an alarm sound. The utility model is characterized in time saving, and labor saving. Simultaneously the measurement accuracy is high.

Description

DC power source system on-line monitoring and measuring apparatus

The utility model relates to a kind of electrical measurement instrument, particularly a kind of DC power system on-line monitoring instrument.

DC power system is occupied critical role in a lot of fields, and battery pack is a kind of main DC power supply device, and especially as the standby power supply of uninterrupted power source, the application of accumulator is more extensive.The maintenance work of accumulator is than more complicated, but very important, by the rules requirement, will measure every day to the terminal voltage of accumulator.It is that the instrument of use is exactly the handheld digital multimeter by artificial fully that present domestic terminal voltage to accumulator is measured.So both time-consuming, lost labor again, and measure very inaccurate yet.

In view of the foregoing, the purpose of this utility model provide a kind ofly save time, laborsaving and DC power system on-line monitoring instrument that measuring accuracy is higher.

The purpose of this utility model is achieved by the following technical solution: it comprises input end collector that links to each other with tested battery feed end and the emitter follower that links to each other with this collector output terminal, the output terminal of emitter follower links to each other with the input end of single chip microcomputer through A/D converter, photoelectrical coupler, the output terminal of single chip microcomputer is connected with display and alarm, and the output control terminal of single chip microcomputer links to each other with the gating end of collector through the collector interface circuit.Utilize single chip microcomputer and collector interface circuit control collector that the terminal voltage of each accumulator in the battery pack is patrolled and examined sampling, the internal memory of single chip microcomputer is delivered in measured signal through emitter follower, A/D converter, photoelectrical coupler, and shown through display, when the terminal voltage of a certain accumulator is lower than setting, by alarm generation alarm sound, prompting the maintainer overhaul or change.

Advantage of the present utility model is can realize online auto monitoring to each accumulator in the battery pack, need not to measure one by one artificial every day, both saves time, and saves manpower again greatly, and measuring accuracy also improves relatively simultaneously.

Below in conjunction with accompanying drawing the utility model is explained.

Fig. 1 is the utility model circuit block diagram.

Fig. 2-4 is the utility model circuit reason figure.

Fig. 5 is the utility model structural representation.

With reference to the accompanying drawings, the utility model mainly comprises collector 1, emitter follower 2, A/D converter 3, photoelectrical coupler 4, single chip microcomputer 5, display 7, alarm 8, collector interface circuit 9 and working power (omit among the figure and do not draw).Also can set up a mini-printer 6.Collector 1 places on the collection circuit printed panel 12 in the Instrument shell 10, and emitter follower 2, A/D converter 3, photoelectrical coupler 4, alarm 8 and single chip microcomputer 5 place on the main circuit board 11 in the housing 10.Display 7 places on the circuit plate 13 in the housing 10.Wherein collector 1 is by four analog switch IC1-IC4(4051) (the sheet number of analog switch and model can be selected according to the quantity of tested accumulator and the demand of side circuit) and latch 74LS374, relay J 1, J2 and drive triode T5, T6 and constitute, analog switch IC1 all adopts differential the connection with IC2, IC3 with IC4, it is the input IN0 pin that the input IN1 pin of IC1 meets IC2, the input IN2 pin of IC1 connects the input IN1 pin of IC2, the rest may be inferred, and the IN7 pin of IC1 and IC2 links to each other.The positive supply V00 with IC1 and IC2, each analog switch of being connected of IC3 and IC4 receives separately input IN0 pin, negative supply VSS, connect the IN6 pin with the INH pin so that analog switch is operated in quick condition.Gating end A, B, the C of analog switch link to each other with the output terminal of collector interface circuit 9.Control analog switch gating end A by single chip microcomputer 5 during collection, B, C, the state of decision analog switch, for example, gating during input IN0, the input IN0 of four slice, thin piece IC1-IC4 is added to output terminal simultaneously, single chip microcomputer 5 driving relay J 1 adhesive this moment, then the anode of accumulator E1 is added to the input end of emitter follower 2 by J1-1, the E1 negative terminal is received simulation ground end by J1-2, what measured this moment is exactly the magnitude of voltage of E1, this shows that single chip microcomputer 5 is by different choice and relay J 1 to analog switch gating end, the switching of J2 can be finished the measurement to accumulator E1-E4; Emitter follower 2 is A741; A/D converter 3 is 5G14433; Photoelectrical coupler 4 is 521-8 and 4N38; Single chip microcomputer 5 is by 8031 chips, and 74LS373 latch, EPROM2764 memory under program, RAM6264 data memory, 74LS245 impact damper, 74LS154 code translator reach with door 74LS08 to be formed; Display 7 is made up of 7 latch 74LS273 and 78 sections charactron LED; Alarm 8 is made up of resistance R 1, triode T1 and hummer Y, and when a certain tested battery tension was lower than setting, single chip microcomputer sent alarm sound by this alarm; Collector interface circuit 9 is made up of latch 74LS273, photoelectrical coupler 521-4 and driving triode T2-T4; Mini-printer 6(TP16) links to each other with single chip microcomputer by printer socket CZ.Instrument shell 10 is provided with display window 15, slotted line gang socket 14 and being used to is measured, is printed, demonstration, date, reset, eight operation push-button 16(K0-K7 of increment, depreciation and carriage return), " measurement " key is used for instant measurement, and " printing " key is used to print any data and the date that exists in the machine; " demonstration " key is used to show any measurement data that exists in the machine; " date " key is used to import date and time; " increment " and " depreciation " key is used to revise date and time.

The utility model has two kinds of methods startups to patrol and examine, and a kind of is that regularly a kind of is manual.Regularly patrol and examine is exactly to work as timing then, instrument begins to measure automatically, and with measurement result and measure the date and together deposit internal memory in, if there is stale value (battery tension is lower than setting) to be detected, report to the police immediately and stale value and way (determining a certain accumulator) thereof are printed, manual measurement only need be pressed " measurement " key and get final product, and this moment, measurement result only printed.And do not deposit internal memory in, and if stale value is arranged, the alert signal of also transmitting messages.

Claims

1, a kind of DC power system on-line monitoring instrument, it is characterized in that: it comprises input end collector that links to each other with tested battery feed end and the emitter follower that links to each other with this collector output terminal, the output terminal of emitter follower links to each other with the input end of single chip microcomputer through A/D converter, photoelectrical coupler, the output terminal of single chip microcomputer is connected with display and alarm, and the output control terminal of single chip microcomputer links to each other with the gating end of collector through the collector interface circuit.