CN201773141U

CN201773141U - LCD induction type high-voltage electrified display device

Info

Publication number: CN201773141U
Application number: CN2010201529147U
Authority: CN
Inventors: 郑琛
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-04-08
Filing date: 2010-04-08
Publication date: 2011-03-23
Anticipated expiration: 2020-04-08

Abstract

The utility model relates to an LCD induction type high-voltage electrified display device, which comprises a casing, an LCD display screen and an internal circuit module, and is characterized in that the internal circuit module comprises an induction signal processing circuit, a follow amplifying circuit, a micro processing circuit and an LCD display screen sequentially. A high-voltage induction sensor socket is electrically connected with an input end of the induction signal processing circuit, one channel of output of the follow amplifying circuit is connected to a phase-checking socket, the micro processing circuit is electrically connected to a crystal oscillator circuit and a self-checking and setting button, and a power supply circuit not only supplies working power to a circuit module but also supplies charging power to the internal circuit module. The device adopts the microprocessor technology and sensing technology, is provided with the LCD display screen to realize visual display with a great deal of information contents, employs a single chip microcomputer and the special algorithm and rejects external interference so as to accurately judge electrified conditions, and has self-locking, self-checking and wire-breakage alarming functions. Besides, the device has functions of judgment instruction of phase sequence error and phase checking.

Description

The charged display device of LCD induction-type high-voltage

Technical field:

The utility model belongs to high pressure checkout equipment field, relates in particular to a kind of charged display device of induction-type high-voltage with the LCD screen.

Background technology:

High-voltage charge display device is to show high-tension electricity charged state imperative equipment in the power transmission and transformation, is installed in to exchange in 50HZ, the rated voltage 3.6～40.5kV high voltage electric equipment, and it is the display device electriferous state in real time, protection operating personnel's safety.What domestic and international existing high-voltage electriferous display locking device adopted is that charactron LED shows, its driving circuit is made up of the input circuit, rectification circuit, filtering circuit, display circuit, anti-jamming circuit, the anti-overvoltage circuit that join with high pressure sensor.The poor anti jamming capability of existing charged display device circuit, indication range is narrow, information content limitation, also defective intuitively inadequately.

Summary of the invention:

The purpose of this utility model is the charged display device of LCD induction-type high-voltage that a kind of display message amount of design is big, the treatment circuit antijamming capability is high.

Technical solutions of the utility model are achieved in that the charged display device of a kind of LCD induction-type high-voltage, comprise the housing that has nuclear phase socket and high voltage induction sensor socket, be installed in LCD display on the case panel, and built-in circuit module, it is characterized in that the built-in circuit module comprises the induced signal treatment circuit successively, follows amplifying circuit, micro-processor interface circuit and LCD display; The high voltage induction sensor socket is electrically connected with induced signal treatment circuit input end, follows amplifying circuit and exports one the tunnel and connect the nuclear phase socket; Micro-processor interface circuit is connected with crystal oscillating circuit and self check respectively, button is set; Power circuit both provided working power for circuit module and LCD backlight, also provided charge power supply for the internal battery module.

Described micro-processor interface circuit is exported one the tunnel and is electrically connected with the pilot relay port.

The words identification of the charged icon of the described LCD display first behavior three-phase, the charged icon of corresponding first row of second row, the third line from left to right voltage parameter, locking, battery electric quantity, unblank and the phase sequence designator.

The utility model adopts advanced microprocessor technology and sensing technology, and complete machine directly is not connected with high-voltage charged body, by the sensing of induction field signal, accurately reflects the charged situation of high-voltage charged body, and security performance is good; And adopt single-chip microcomputer and tailor-made algorithm, and reject external interference, accurately judge charged situation, the reliability height, and have locking, self check, connection conductor cord disconnection warning function, also have the judgement indication and the nuclear phase function of phase sequence mistake in addition.

Description of drawings:

Below in conjunction with concrete legend the utility model is described further:

The charged display device theory diagram of Fig. 1 LCD induction-type high-voltage

The charged display device circuit diagram of Fig. 2 LCD induction-type high-voltage

The charged display device display screen of Fig. 3 LCD induction-type high-voltage synoptic diagram

Wherein

1-high-tension apparatus 2-high voltage induction sensor 3-shielded conductor

The charged icon 5-of 4-words identification 6-designator

Embodiment:

With reference to Fig. 1, the electric field signal of high voltage bus that high voltage induction sensor 2 collects or high-tension apparatus 1, be connected on the housing high voltage induction sensor socket through shielded conductor 3, the induced signal treatment circuit of electric field signal in circuit module, follow amplifying circuit after, flow to micro-processor interface circuit, after calculating and analyze by the single-chip microcomputer in the micro-processor interface circuit, the conditional information of finishing dealing with is transported to LCD display, whether charged by liquid crystal LCD display system, install whether locking, secondary power supply state, system voltage level or the like various information; Simultaneously, signal micro-processor interface circuit unit is transported to the output of pilot relay port isolation with control information, by the pilot relay action, realizes long-range deixis and remote alarms.Follow amplifier circuit unit also with the waveform of input, deliver to the nuclear phase interface after the conditioning and use for phasing tester; Complete machine processing procedure institute energy requirement is provided by AC power 220V, finishes step-down and each module working power of rectification confession by power circuit, also provides charge power supply for the internal battery module; Micro-processor interface circuit is connected with crystal oscillating circuit and self check respectively, button is set.

With reference to the charged display device circuit diagram of Fig. 2 LCD induction-type high-voltage, each circuit module composition and principle of work are as follows:

The high voltage induction sensor: be made up of three inductosyns 2, three shielded conductors 3, the three-phase alternating current electric field induction signal of collection is introduced display device through high voltage induction sensor socket P1.

Induced signal treatment circuit and follow amplifying circuit: by three protection diode D31, D32, D33, three operational amplifier A 1, A2, A3 form, signal imports A1, A2, A3 operational amplifier by D31, D32, D33 into after protecting diode limiting, after following amplification by operational amplifier, importing micro-processor interface circuit, also is RA1, RA2, the RA3 pin of single-chip microcomputer MUC, adopt tailor-made algorithm, reject external interference, accurately judge charged situation, deliver to the nuclear phase interface simultaneously and use for phasing tester; The nuclear phase interface is corresponding respectively to be connected: positive source, and the charged corresponding electric signal of power cathode and three-phase, putting in order can be random, and the professional etiquette of not running business into strong one is fixed.

In single-chip microcomputer MUC,, judge that signal connects the duty of lead, judge phase differential between signal over the ground, and then judge whether the phase sequence mistake is whether charged with system according to the state that imports the charged signal of three-phase; Simultaneously according to lead-in signal waveform situation, decision-making system electric pressure; While is according to the RA4 pin potential change of single-chip microcomputer MUC, decision maker secondary power supply duty; RB0, RB1, RB2, RB3, RB4, RB5, RB6, RB7, RA6, RA7 pin by single-chip microcomputer MUC drive the LCD display module respectively, provide system whether charged, whether install whether locking, phase sequence mistake, various information such as secondary power supply state, system voltage level show, RA0 by one-chip computer MUC drives relay R ELAY, implement device blocking function.

With reference to Fig. 3, the charged display device display screen of LCD induction-type high-voltage synoptic diagram, the words identification 5 of the charged icon of the LCD display first behavior three-phase 4, the charged icon of corresponding first row of second row, the third line from left to right voltage parameter, locking, battery electric quantity, unblank and phase sequence designator 6, can intuitively show by pictograph.Display screen in the display device adopts liquid crystal LCD to show, uses general symbol(s), and the display message amount is big, abundant in content as: the information whether system charged, install whether locking information, secondary power supply status information, the various information of the relevant high pressure display device of system voltage grade or the like; Adopt backlight simultaneously, can be under bright and dim condition, all clear demonstration.

The charged demonstration blocking device of this novel induction-type high-voltage adopts inductosyn, non-contact measurement, and safe and reliable, display adopts multiple separant interference protection measure, and by strict electromagnetic compatibility test, can move in high voltage electric equipment reliably.

Claims

1. charged display device of LCD induction-type high-voltage, comprise the housing that has nuclear phase socket and high voltage induction sensor socket, be installed in LCD display on the case panel, and built-in circuit module, it is characterized in that the built-in circuit module comprises the induced signal treatment circuit successively, follows amplifying circuit, micro-processor interface circuit and LCD display; The high voltage induction sensor socket is electrically connected with induced signal treatment circuit input end, follows amplifying circuit and exports one the tunnel and connect the nuclear phase socket; Micro-processor interface circuit is connected with crystal oscillating circuit and self check respectively, button is set; Power circuit both provided working power for circuit module and LCD backlight, also provided charge power supply for the internal battery module.

2. the charged display device of LCD induction-type high-voltage according to claim 1 is characterized in that micro-processor interface circuit exports one the tunnel and be electrically connected with the pilot relay port.