CN2636251Y

CN2636251Y - Voltage/current on-line monitor

Info

Publication number: CN2636251Y
Application number: CN 03254544
Authority: CN
Inventors: 方康玲; 史清源; 付旭
Original assignee: Wuhan University of Science and Engineering WUSE
Current assignee: Wuhan University of Science and Engineering WUSE
Priority date: 2003-06-20
Filing date: 2003-06-20
Publication date: 2004-08-25
Anticipated expiration: 2013-06-20

Abstract

The utility model relates to an online monitoring and recording the voltage and current change device. The both ends of a tested power are connected with a voltmeter and ammeter [1] with a transformer separately in parallel and in series. Wherein, the output end of the voltmeter and ammeter [1] analog variable is connected with the analog variable input passage of an A/D transform chip [3] via a standard resistance; the output passage of the A/D transform chip [3] is connected to the data acquisition port of an MCU [4]; the MCU [4] is connected to the serial port of a data radio [13] via a serial port [12]; the data radio [13] carries out the duplex communication with a remote data radio [14] over the air; the serial port of remote data radio [14] is connected to the serial port of a PC [15]; an LED display module [17] is connected to the MCU [4] via a peripheral chips [16] [18]; the I/O ports of the MCU [4] are respectively connected with five function buttons and switching signals [10] [11] of the tested power. The utility model can display the voltage and current values in real time, record the jumping time of the voltage and current values of the power and transport the data to the remote PC by wireless communication.

Description

A kind of voltage/stream on-Line Monitor Device

One, technical field

The utility model relates to the device of a kind of on-line monitoring and recording voltage/rheologyization.

Two, background technology

Many large-scale electric equipments need its duty of on-line monitoring, as the time (time when comprising normal connection/shut-in time and fault trip) of needs record consumer connection/powered-down and voltage/flow valuve at that time, so that carry out fault alarm and postmortem management.

At present, the voltage on-Line Monitor Device mainly contains two classes: a class is that the demonstration and the harmonic wave of voltage/stream monitors, as the WKZ-II type Harmonious Waves in Power Systems monitor of Shanghai University Of Electric Power's exploitation, the intelligent electric power monitor that Chan river, Xi'an automation engineering company limited produces; Another kind of is the High-Voltage Insulation monitoring device, comprises the overheated and insulating monitoring to cable, but lacks monitoring and pen recorder to the consumer duty.At present, these work are generally all by manually finishing, workman's poor working environment not only, and record bigger randomness, and there is error, bring great inconvenience to production management, especially can not carry out long-range voltage/stream on-line monitoring.

Three, summary of the invention

Task of the present utility model provides and a kind ofly can show in real time that the time of saltus step appears in the supply voltage/flow valuve of surveying, recording power voltage/flow valuve, the mode by wireless telecommunications is delivered to real-time voltage/flow valuve and data such as time that saltus step occurs the on-Line Monitor Device of the PC of far-end simultaneously.

For realizing above-mentioned task, the technical scheme that the utility model adopted is: become the voltage/stream table that send output at the two ends of survey power supply parallel/series one band, the analog quantity output terminal that band becomes the voltage/stream table that send output is connected with the analog input channel of A/D conversion chip by a measuring resistance, and the output channel of A/D conversion chip is connected to the data acquisition mouth of MCU; MCU is connected to the serial ports of data radio station by serial ports, and data radio station carries out duplex signaling by the data radio station of wireless mode and far-end, and the serial ports of far-end data radio station is connected to the serial ports of PC; The LED display module is connected to MCU by peripheral chip, and the I/O mouth of MCU is connected with the survey power switch signal with 5 function buttons respectively.

5 above-mentioned function buttons be respectively inquire button, forward button, backward button, revise button, reset button; In addition, the LED display module contains 9 LED pieces, wherein contain 1 way LED piece, 2 number of times LED pieces, 2 hours LED pieces, 2 minutes LED pieces, 2 second the LED piece.

Owing to adopt above technical scheme, the utility model can show the supply voltage/flow valuve of surveying in real time, when breaking down, can report to the police, the time of saltus step appears in recording power voltage/flow valuve, monitors real-time voltage/stream and the operation of inquiry power supply and the historical record of fault at the scene for the staff; Mode that simultaneously can be by wireless telecommunications is delivered to real-time voltage/flow valuve and data such as time that saltus step occurs the PC of far-end, on the PC of far-end, voltage/stream is carried out curve display, just power source voltage/the flow valuve of surveying can be monitored for the dispatcher in place, the time that saltus step appears in voltage/flow valuve can also be inquired about away from the scene.Overcome the randomness and the error of manual record, record has accurately also improved workman's working environment.

Four, description of drawings

Fig. 1 is a synoptic diagram of the present utility model.

Five, embodiment

The utility model as shown in Figure 1, two ends parallel/series one band of the power supply of surveying becomes the voltage/stream table [1] that send output, the current analog amount signal that band becomes voltage/stream table [1] output of sending output is converted to the voltage analog signal by a measuring resistance [2], voltage analog signal after the conversion is connected with the analog acquisition passage of A/D conversion chip [3], the output channel of A/D conversion chip [3] is connected to MCU[4] the data acquisition mouth, MCU[4] be connected to the serial ports of data radio station [13] by serial ports [12], data radio station [13] carries out duplex signaling by the data radio station [14] of wireless mode and far-end, and the serial ports of far-end data radio station [14] is connected to the serial ports of PC [15]; MCU[4] the I/O mouth be connected with survey power switch signal [10], [11] with 5 function buttons respectively, 5 function buttons be respectively inquire button [5], forward button [6], backward button [7], revise button [8], reset button [9]; LED display module [17] is connected to MCU[4 by peripheral chip [16], [18]], LED display module [17] contains 9 LED pieces, 9 LED pieces from left to right successively content displayed be, 1 way LED piece, 2 number of times LED pieces, 2 hours LED pieces, 2 minutes LED pieces, 2 second the LED piece.

MCU[4] be core of the present utility model, be the parts of executive routine.Band becomes the real-time display voltage/flow valuve of the voltage/stream table [1] that send output, and send the current analog amount signal of exporting 4～20mA through change, and this signal is converted to the voltage analog signal of 1～5V by the measuring resistance [2] of one 250 Ω.A/D conversion chip [3] is gathered this voltage signal and is carried out A/D conversion, is converted to digital quantity signal, delivers to MCU[4] the data acquisition mouth.MCU[4] handle the digital quantity signal that collects, the digital quantity signal that it is corresponding with threshold voltage/stream is compared.Represent power connection greater than threshold value, represent power-off less than threshold value.MCU[4] time of the existing saltus step of recording voltage/outflow, be saved in the data-carrier store, so that inquiry.

The function of 5 buttons [5], [6], [7], [8], [9] is followed successively by: when pressing inquire button [5], show the time that way, number of times and up-to-date primary voltage/flow valuve occurs.At this moment, the number of times that way LED display module content displayed will be pressed according to inquire button change (press inquire button 1 time, way LED shows 1, presses inquire button 2 times, and way LED is shown as 2, and the like ...).By forward button [6], button [7] can be thumbed record backward.Can revise system time by revising button [8], when pressing 1 correction button [8], revising second, when pressing 2 correction buttons [8], to minute revising, when pressing 3 correction buttons [8], to hour regulating, when pressing 4 correction buttons [8], revise and confirm.Reset button [9] is removed the record of voltage/flow valuve bound-time when pressing.

MCU[4 is delivered in on-the-spot switching operation signal [10], [11]] the I/O mouth, MCU[4] handle these signals, according to the logical relation between the signal, when breaking down, report to the police.

System is by MCU[4] control, by serial ports [12] data are delivered to data radio station [13], data radio station [13] adopts the mode of wireless telecommunications data to be sent to the data radio station [14] of far-end, data radio station [14] is delivered to data the PC [15] of far-end, far-end PC [15] is saved in database to the data that receive, so that query note and curve display.

Claims

1, a kind of voltage/stream on-Line Monitor Device, it is characterized in that becoming the voltage/stream table [1] that send output at the two ends of survey power supply parallel/series one band, the analog quantity output terminal that band becomes the voltage/stream table [1] send output is connected with the analog input channel of A/D conversion chip [3] by-measuring resistance [2], the output channel of A/D conversion chip [3] is connected to MCU[4] the data acquisition mouth, MCU[4] be connected to the serial ports of data radio station [13] by serial ports [12], data radio station [13] carries out duplex signaling by the data radio station [14] of wireless mode and far-end, the serial ports of far-end data radio station [14] is connected to the serial ports of PC [15], LED display module [17] is by peripheral chip [16], [18] be connected to MCU[4], MCU[4] the I/O mouth respectively with 5 function buttons and the power switch signal of surveying [10], [11] be connected.

2, voltage according to claim 1/stream on-Line Monitor Device, it is characterized in that described 5 function buttons be respectively inquire button [5], forward button [6], backward button [7], revise button [8], reset button [9].

3, voltage according to claim 1/stream on-Line Monitor Device, it is characterized in that described LED display module [17] contains 9 LED pieces, wherein contain 1 way LED piece, 2 number of times LED pieces, 2 hours LED pieces, 2 minutes LED pieces, 2 second the LED piece.