CN2450673Y - Intelligent insulation resistance testing recording instrument - Google Patents

Abstract

The utility model relates to an intelligent testing and recording instrument for insulation resistance, which is used for detecting the running condition of insulators in an electric line. The utility model is composed of a single chip computer, a power circuit, a keyboard circuit, a high voltage generating circuit, a detecting amplifying circuit, an A/D switching circuit, a clock circuit, a data storage circuit, a PC computer communication interface circuit and an LCD display circuit. The utility model has the advantage that items of an insulator detection running platform account, such as line name, rod number, string number, bottle position, time, insulated resistance value, responsible person, manufacturer, production data, etc. of the insulator, are programmed and written into an ROM of a CPU so as to facilitate field recording arrangement and PC computer data processing and provide reference for insulation surveillance and safety administration of equipment.

Description

Intelligence megger test registering instrument

The utility model relates to a kind of registering instrument that detects power circuit insulator resistance.

When the power circuit insulator detects, the insualtor detector that uses needs the on-the-spot artificial notes in the high-altitude, and its work efficiency and data compilation are not good enough, and the utility model can be avoided this type of deficiency, testing is improved, for apparatus insulated supervision and safety management provide reliable foundation.

The purpose of this utility model just provides electric transmission line isolator test site record, sets up the registering instrument that the insulator operation detects machine account true rule.

The technical solution of the utility model is as follows:

A ₄Be stabilized voltage supply, for the utility model provides power for operation;

S ₁-S ₅, R ₉-R ₁₃, A ₂Being keyboard circuit, is " insulator detects the operation machine account " of the present utility model data input-output operation device, S ₁-cursor movement key; S ₂-ESC Escape; S ₃-5000V high pressure self check key; S ₄-insulator detects key; S ₅-preservation key; A ₂-parallel input string line output integrated circuit (IC) chip connects CPU;

A _9:A, N ₆, N ₂, I ₁, N ₁, T ₁, D ₁-D ₉, A _1-01, P ₁, R ₀-R ₇, C ₃-C ₁₁Deng forming " Bootstrap " high-pressure generating circuit, provide the 5000V insulator to detect voltage;

A ₀With A ₁₅Be the external electrode testing circuit, be used to detect the insulator resistance value;

A ₅Being one-chip CPU, is the acp chip that the utility model data operation is handled, and its input and output to external data are finished in two steps: send low eight bit address signals; The read-write external data.

A ₆Be address decoder, low eight bit address signals are provided;

A ₃Be the flash memory of 512K byte, the video data that is used to preserve GB2312 Chinese character dot matrix character library and detection and location data, resistance value etc. and sets is as specification, person liable, manufacturer, production days; These The data single-chip microcomputers and PC communication modes write; Owing to adopted electricity can wipe technical measures, various data can be revised as required.

A ₇, P ₂For with the interface circuit of PC communication, A ₇ External 4 chip capacitors, produce satisfy the utility model and PC communication carry out level conversion ± the 10V voltage request.

A ₁With A ₁₃, A ₁₄, R ₁₅-R ₁₈Form digital adjustable gain amplifying circuit; A ₁₃, A ₁₄Be the serial data adjustable resistance, corresponding the changing of resistance output terminal resistance after 6 bit data imported in logging data when its clock line CLK uprises level by low level.Because A ₁₃, A ₁₄Be feedback resistance, its resistance size decision A _1-04And A _1-02Enlargement factor, therefore also determined A _1-04And A _1-02Output voltage.Its enlarging function can be with R ₁₆On the mV step voltage be amplified to the 1V level, with the deficiency that remedies the A/D converter precision and the requirement of data-switching drive current;

A ₁₂Be 82 road serial a/d converters, and A _1-03, P ₆, R ₁₉Constituting precision is the A/D change-over circuit of 20mV;

A ₁₁Be real-time clock, its interface is I ²The C standard interface; A ₁₀, A _8:A-A _8:D, E ₁, P ₄, R ₁₄Constitute LCD display module and chip select circuit thereof.

As key S ₄When pressing, P ₁₀Output low level, N ₁Work, A ₀Output 5000V high voltage, behind insulator by A ₁₅Ground connection is at R ₁₆On voltage drop through A _1-04, A _1-02After two-stage is amplified, by A ₁₂Be converted to digital signal, send LCD to show in the CPU computing and after reading the resistance value data.S ₃When key is pressed, P ₁₀Also output low level, high pressure is through R ₉, R ₇After the dividing potential drop, send A _1-03Amplify, provide enough current signal to A ₁₂Carry out data-switching,, judge whether meet the requirement of 5000V output voltage according to the data that CPU reads.Work as P ₁₀Output low level, A _9:AThe output high level, N ₆Conducting; After powering on, A _1-01(-) end be input as 0V, (+) end is input as 3V, this moment A _1-01Output terminal is a high level, N ₂Conducting; And N ₁Conducting forms vibration, T ₁The output high pressure is through D ₁-D ₉Reach 5000V output after boosting; When output is higher than 5000V, A _1-01Output voltage reduces, N ₁The emitter resistance to earth increases, and vibration is weakened, and reduces output voltage; On the contrary, output voltage reduces, A _1-01Output increases, and vibration is strengthened, and output voltage improves; So A _1-01Play pressure stabilization function.

Using method: selected line name, bar number, insulator position before test, after being detected, insulator gets final product record, and a slice insulator is down pointed in current demonstration simultaneously automatically.

Advantage of the present utility model is: to " the insulator operation detects machine account " projects such as the line name at insulator place, bar number, string number, bottle position, time, insulating resistance value, person liable, manufacturer, production days, compiled program writes among the ROM of CPU, be convenient to on-the-spot typing registering instrument, array data, raise the efficiency, for apparatus insulated supervision and safety management provide reliable basis.

Description of drawings:

Figure one is a theory diagram of the present utility model;

Figure two is the utility model main circuit schematic diagrams;

Figure three is circuit theory diagrams of the present utility model;

Figure four is the utility model testing process block diagrams.

Embodiment:

Select MCS51 series monolithic 8052 or compatible CPU for use; According to the power circuit that sets in this Figure of description, " five keys " keyboard circuit, high-pressure generating circuit, detect and amplifying circuit, the A/D change-over circuit, clock (CLK) circuit, data storage (FLASH RAM) circuit, the interface circuit that carries out communication with PC, the LCD display circuit, employing can and be carried out the standard connected mode that reading and writing data exchanges with the PC compatibility operation, the selection of components and parts and chip can be selected by the by specification accompanying drawing, also can under the preceding topic that satisfies the given parameter request of this instructions, select other components and parts for use, formulation meets the processing technology of national standard, can make the utility model.

Claims (1)

1, intelligent megger test registering instrument, relate to a kind of registering instrument that detects power circuit insulator resistance, the interface circuit, the LCD display circuit that carry out communication by single-chip microcomputer and power circuit, keyboard circuit, high-pressure generating circuit, detection and amplifying circuit, A/D change-over circuit, clock circuit, data storage circuitry, with PC, employing can and be carried out the standard connected mode formation that reading and writing data exchanges with the PC compatibility operation, it is characterized in that:

(1), selects MCS51 series monolithic 8052 or compatible CPU for use;

(2), A _9:A, N ₆, N ₂, I ₁, N ₁, T ₁, D ₁-D ₉, A ₁- ₁₀, P ₁, R ₀-R ₇, C ₃-C ₁₁Deng forming " Bootstrap " high-pressure generating circuit, provide 5000V to detect voltage;

(3), A ₀With A ₁₅Constitute the external electrode testing circuit;

(4), A ₁With A ₁₃, A ₁₄, R ₁₅-R ₁₈Form digital adjustable gain amplifying circuit;

(5), data storage circuitry chip A ₃FLASH RAM storer for the 512K byte;

(6), A ₇, P ₂The interface circuit of formation and PC communication, A ₇External 4 chip capacitors.

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